Area
Code | Prefix | City/Switch Name
(Click for city search) | State/Prov.
Area Map | Telephone Company
Web link | Telco
Type | More
Info |
|---|
| 240 | 200 | WASHINGTON ZONE 14 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 201 | RIDGE | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 202 | HIGHFIELD | Maryland | ONVOY, LLC - MD | | More |
| 240 | 203 | WASHINGTON ZONE 10 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 204 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 205 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 206 | WSNG236Z14 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 207 | DAMASCS236 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 208 | LA PLATA | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 209 | INDIANHEAD | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 210 | WALDORF | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 212 | OAKLAND | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 213 | WALDORF | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 214 | MECHANCSVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 215 | FREDERICK | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 216 | WALDORF | Maryland | METROPCS, INC. | | More |
| 240 | 217 | HAGERSTOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 218 | NANJEMOY | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 219 | TOMPKINSVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 220 | POOLESVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 221 | WSNGTNZN11 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 222 | WALDORF | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 223 | WSHNGTNZN2 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 224 | WSHNGTNZN6 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 225 | FREDERICK | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 226 | OAKLAND | Maryland | ONVOY, LLC - MD | | More |
| 240 | 227 | MYERSVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 228 | WSNG236Z13 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 229 | WALDORF | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 230 | HUGHESVL | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 231 | HAGERSTOWN | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 232 | WSNGTNZN14 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 233 | TOMPKINSVL | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 234 | DAMASCS236 | District of Columbia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 235 | WSHNGTNZN2 | Maryland | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 236 | WSNG236Z15 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 237 | LXTNPKGRML | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 238 | WSNGTNZN10 | Maryland | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 239 | LEONARDTN | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 240 | DAMASCS240 | Maryland | FRACTEL, LLC | | More |
| 240 | 241 | WSNG236Z13 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 242 | WSNGTNZN11 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 243 | GAITHERSBG | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 244 | WSNGTNZN16 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 245 | WSNG236Z14 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 246 | GAITHERSBG | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 247 | WSHNGTNZN3 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 248 | RIDGE | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 249 | MECHANCSVL | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 250 | BRANDYWINE | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 251 | HIGHFIELD | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 252 | GAITHERSBG | Virginia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 253 | WSHNGTNZN6 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 254 | HUGHESVL | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 255 | POOLESVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 256 | LEONARDTN | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 257 | NANJEMOY | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 258 | RIDGE | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 259 | HUGHESVL | Maryland | ONVOY SPECTRUM, LLC | | More |
| 240 | 260 | WSNG236Z14 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 261 | WSNGTNZN10 | Virginia | ONVOY, LLC - MD | | More |
| 240 | 262 | DAMASCS236 | Virginia | COMCAST PHONE | GENERAL | More |
| 240 | 263 | DAMASCS236 | Virginia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 264 | LAUREL236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 265 | WSHNGTNZN5 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 266 | WSNG236Z14 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 267 | WSHNGTNZN5 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 268 | WSNGTNZN10 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 269 | WSNGTNZN16 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 270 | WSNG236Z14 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 271 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 272 | WSNG236Z14 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 273 | WSHNGTNZN6 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 274 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 275 | GRANTSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 276 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 277 | WSHNGTNZN2 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 278 | WASHINGTON ZONE 11 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 279 | WALDORF | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 280 | LAUREL236 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 281 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 282 | MECHANCSVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 283 | WSNGTNZN11 | Maryland | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 284 | FROSTBURG | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 285 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 286 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 287 | HANCOCK | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 288 | THURMONT | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 289 | WSHNGTNZN6 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 290 | WSNGTNZN11 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 291 | HAGERSTOWN | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 292 | WSNGTNZN11 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 293 | WSNGTNZN12 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 294 | LAUREL236 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 295 | LAUREL236 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 296 | WSHNGTNZN4 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 297 | WSNG236Z13 | Virginia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 298 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 299 | WALDORF | Maryland | METROPCS, INC. | | More |
| 240 | 300 | WALDORF | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 301 | CLEAR SPG | Maryland | ONVOY, LLC - MD | | More |
| 240 | 302 | ASHTON | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 303 | WSNGTNZN16 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 304 | WSHNGTNZN5 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 305 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 306 | GAITHERSBG | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 307 | EMMITSBURG | Maryland | AT&T - LOCAL | CLEC | More |
| 240 | 308 | DAMASCS236 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 309 | LAUREL | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 310 | HAGERSTOWN | Maryland | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | WIRELESS PROV | More |
| 240 | 312 | WSHNGTNZN5 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 313 | HAGERSTOWN | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 314 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 315 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 316 | ASHTON | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 317 | LXTNPKGRML | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 318 | WSNGTNZN16 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 319 | RIDGE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 320 | WALDORF | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 321 | OAKLAND | Maryland | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | WIRELESS PROV | More |
| 240 | 322 | MCCOOLE | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 323 | EMMITSBURG | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 324 | ASHTON | District of Columbia | YMAX COMMUNICATIONS CORP. - MD | | More |
| 240 | 325 | DAMASCS236 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 326 | WSNG236Z15 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 327 | GAITHERSBG | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 328 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 329 | HAGERSTOWN | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 330 | INDIAN HEAD | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 331 | WSHNGTNZN3 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 332 | TOMPKINSVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 333 | WSHNGTNZN2 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 334 | WSNG236Z14 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 335 | WSNG236Z14 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 336 | WSHNGTNZN2 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 337 | WSHNGTNZN5 | Virginia | ONVOY, LLC - MD | | More |
| 240 | 338 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 339 | WSNG236Z15 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 340 | POOLESVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 341 | FREDERICK | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 240 | 342 | ASHTON236 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 343 | HAGERSTOWN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 344 | FREDERICK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 345 | ASHTON238 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 346 | WALDORF | Maryland | METROPCS, INC. | | More |
| 240 | 347 | HAGERSTOWN | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 348 | WSNGTNZN16 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 349 | LA PLATA | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 350 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 351 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 352 | LA PLATA | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 353 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 354 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 355 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 356 | MYERSVILLE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 357 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 358 | DAMASCS236 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 359 | INDIANHEAD | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 360 | LEONARDTN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 361 | GAITHERSBG | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 362 | CUMBERLAND | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 363 | WSNGTNZN11 | Virginia | ONVOY, LLC - MD | | More |
| 240 | 364 | GAITHERSBG | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 365 | DAMASCS236 | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 366 | WILLIAMSPT | Maryland | AT&T - LOCAL | CLEC | More |
| 240 | 367 | FREDERICK | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 368 | WALDORF | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 369 | MOUNT AIRY | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 370 | WASHINGTON ZONE 12 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 371 | WSNGTNZN12 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 372 | GAITHERSBG | Maryland | METROPCS, INC. | | More |
| 240 | 373 | WSNG236Z13 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 374 | LAUREL236 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 375 | WSHNGTNZN5 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 376 | HUGHESVL | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 377 | INDIANHEAD | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 378 | CUMBERLAND | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 379 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 380 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 381 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 382 | IJAMSVILLE | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 383 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 384 | LXTNPKGRML | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 385 | MYERSVILLE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 386 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 387 | WSNG236Z13 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 388 | GAITHERSBG | Maryland | METROPCS, INC. | | More |
| 240 | 389 | ASHTON236 | District of Columbia | BROADVIEW NETWORKS OF VIRGINIA, INC. - VA | | More |
| 240 | 390 | ASHTON236 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 391 | WSNG236Z13 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 392 | WSHNGTNZN5 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 393 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 394 | MOUNT AIRY | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 395 | WSHNGTNZN2 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 396 | WSHNGTNZN2 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 397 | WASHINGTON ZONE 2 | Virginia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 398 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 399 | WSNGTNZN10 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 400 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 401 | WSNGTNZN10 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 402 | WSNG236Z13 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 403 | WSNGTNZN10 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 404 | GAITHERSBG | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 405 | FREDERICK | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 406 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 407 | WSNGTNZN16 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 408 | LEONARDTOWN | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 409 | FREDERICK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 410 | CUMBERLAND | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 412 | WALDORF | Maryland | METROPCS, INC. | | More |
| 240 | 413 | WSHNGTNZN4 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 414 | WSHNGTNZN6 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 415 | FREDERICK | Maryland | YMAX COMMUNICATIONS CORP. - MD | | More |
| 240 | 416 | WALDORF | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 417 | WSHNGTNZN5 | Maryland | METROPCS, INC. | | More |
| 240 | 418 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 419 | WALDORF | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 420 | HAGERSTOWN | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 421 | WSNGTNZN10 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 422 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 423 | WSHNGTNZN3 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 424 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 425 | WSHNGTNZN2 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 426 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 427 | WALDORF | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 428 | WSNGTNZN10 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 429 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 430 | WSNGTNZN11 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 431 | LXTNPKGRML | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 432 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 433 | WSNGTNZN12 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 434 | LEONARDTN | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 435 | WALDORF | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 436 | BUCKEYSTN | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 437 | ASHTON236 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 438 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 439 | WASHINGTON | District of Columbia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 440 | FREDERICK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 441 | WSHNGTNZN6 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 442 | OAKLAND | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 443 | WSHNGTNZN6 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 444 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 445 | ASHTON | Maryland | ONVOY, LLC - MD | | More |
| 240 | 446 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 447 | WSNGTNZN10 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 448 | LAUREL | Maryland | ONVOY, LLC - MD | | More |
| 240 | 449 | GAITHERSBG | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 450 | WSHNGTNZN3 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 451 | WASHINGTON ZONE 4 | Virginia | ONVOY, LLC - MD | | More |
| 240 | 452 | HAGERSTOWN | Maryland | LUMOS NETWORKS INC. - VA | CLEC | More |
| 240 | 453 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 454 | GAITHERSBG | Virginia | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 455 | WSHNGTNZN5 | Virginia | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 456 | LAUREL236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 457 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 458 | WALDORF | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 459 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 460 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 461 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 462 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 463 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 464 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 465 | WSHNGTNZN2 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 466 | MECHANCSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 467 | WSHNGTNZN4 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 468 | WALDORF | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 469 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 470 | WASHINGTON ZONE 16 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 471 | WSNGTNZN12 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 472 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 473 | WSNG236Z13 | Virginia | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 474 | WASHINGTON ZONE 14 | District of Columbia | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 475 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 476 | WSHNGTNZN3 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 477 | GAITHERSBG | Maryland | LIGHTWAVE COMMUNICATIONS, LLC - MD | | More |
| 240 | 478 | WSHNGTNZN3 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 479 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 480 | WASHINGTON ZONE 12 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 481 | WSHNGTNZN3 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 482 | WSHNGTNZN2 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 483 | WSHNGTNZN2 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 484 | WASHINGTON ZONE 11 | Virginia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 485 | WSHNGTNZN3 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 486 | WSNG236Z14 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 487 | WSHNGTNZN4 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 488 | WASHINGTON ZONE 5 | District of Columbia | SHENTEL COMMUNICATIONS, LLC. - MD | | More |
| 240 | 489 | POOLESVL | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 490 | MIDDLETOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 491 | WSHNGTNZN3 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 492 | WSHNGTNZN5 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 493 | WSHNGTNZN6 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 494 | WSHNGTNZN3 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 495 | WSHNGTNZN4 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 496 | CUMBERLAND | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 497 | WSHNGTNZN2 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 498 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 499 | WSNGTNZN10 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 500 | HAGERSTOWN | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 501 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 502 | WSHNGTNZN3 | Maryland | BANDWIDTH.COM CLEC, LLC - DC | | More |
| 240 | 503 | LXTNPKGRML | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 504 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 505 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 506 | WSNGTNZN10 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 507 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 508 | WSHNGTNZN5 | Maryland | METROPCS, INC. | | More |
| 240 | 509 | WSNG238Z14 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 510 | WSNG236Z15 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 512 | WSNG238Z13 | District of Columbia | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 513 | HAGERSTOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 514 | WSNGTNZN11 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 515 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 516 | WSNGTNZN12 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 517 | HAGERSTOWN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 518 | LEXINGTON PARK GREA | District of Columbia | NUSO, LLC | | More |
| 240 | 519 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 520 | HAGERSTOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 521 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 522 | CUMBERLAND | Maryland | METROPCS, INC. | | More |
| 240 | 523 | LA PLATA | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 524 | LAUREL236 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 525 | WSNG236Z15 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 526 | LEONARDTN | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 527 | HAGERSTOWN | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 528 | HUGHESVL | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 529 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 530 | LAUREL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 531 | WSHNGTNZN3 | Maryland | TELNYX LLC | | More |
| 240 | 532 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 533 | WSHNGTNZN3 | District of Columbia | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 534 | LAUREL | District of Columbia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 535 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 536 | ASHTON236 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 537 | TOMPKINSVILLE | Maryland | ATLANTECH ONLINE, INC. - MD | | More |
| 240 | 538 | LEONARDTN | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 539 | WSHNGTNZN4 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 540 | WASHINGTON ZONE 15 | Maryland | WIDE VOICE, LLC - MD | | More |
| 240 | 541 | WSHNGTNZN2 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 542 | WSNG236Z13 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 543 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 544 | WSNG236Z14 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 545 | WSNG236Z15 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 546 | WSNGTNZN16 | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 547 | LAUREL236 | Virginia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 548 | WSNG236Z14 | District of Columbia | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 549 | BRANDYWINE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 550 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 551 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 552 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 553 | WSNG236Z13 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 554 | LAUREL236 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 555 | WSHNGTNZN4 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 556 | WSNG236Z14 | Maryland | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 557 | WSHNGTNZN6 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 558 | WSNGTNZN11 | Maryland | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | | More |
| 240 | 559 | ASHTON236 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 560 | WSNGTNZN12 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 561 | LEXINGTON PARK GREA | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 562 | WSHNGTNZN2 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 563 | GAITHERSBURG | Virginia | ONVOY, LLC - MD | | More |
| 240 | 564 | WASHINGTON ZONE 4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 565 | LAUREL238 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 566 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 567 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 568 | LAUREL236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 569 | FLINTSTONE | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 570 | ASHTON238 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 571 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 572 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 573 | WSNG236Z15 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 574 | WALDORF | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 575 | FREDERICK | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 576 | HAGERSTOWN | Maryland | VONAGE AMERICA LLC | | More |
| 240 | 577 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 578 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 579 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 580 | CUMBERLAND | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 581 | LAUREL236 | District of Columbia | PAETEC COMMUNICATIONS, INC. - DC | CLEC | More |
| 240 | 582 | WSHNGTNZN4 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 583 | LAUREL236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 584 | LAUREL236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 585 | WALDORF | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 586 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 587 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 588 | GRANTSVL | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 589 | MCCOOLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 590 | WASHINGTON ZONE 3 | Virginia | METROPCS, INC. | | More |
| 240 | 591 | HAGERSTOWN | Maryland | SHENTEL COMMUNICATIONS, LLC. - MD | | More |
| 240 | 592 | WSNG236Z13 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 593 | LAUREL238 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 594 | BITTINGER | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 595 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 596 | ASHTON236 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 597 | GAITHERSBG | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 598 | HUGHESVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 599 | WSNGTNZN10 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 600 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 601 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 602 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 603 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 604 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 605 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 606 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 607 | WALDORF | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 608 | MYERSVILLE | Maryland | NUSO, LLC | | More |
| 240 | 609 | CUMBERLAND | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 610 | WSHNGTNZN4 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 612 | WSHNGTNZN5 | Maryland | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | CLEC | More |
| 240 | 613 | WSHNGTNZN4 | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 614 | LXTNPKGRML | Maryland | METROPCS, INC. | | More |
| 240 | 615 | WSHNGTNZN3 | Maryland | METROPCS, INC. | | More |
| 240 | 616 | WSNG236Z13 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 617 | WSHNGTNZN2 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 618 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 619 | WSHNGTNZN5 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 620 | WSNGTNZN10 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 621 | WSNGTNZN11 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 622 | LA PLATA | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 623 | WSHNGTNZN3 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 624 | WSNG236Z13 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 625 | HAGERSTOWN | Maryland | METROPCS, INC. | | More |
| 240 | 626 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 627 | WSNGTNZN11 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 628 | MECHANCSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 629 | FREDERICK | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 630 | WSHNGTNZN2 | Maryland | SPRINT SPECTRUM L.P. | PCS | More |
| 240 | 630 | WSHNGTNZN2 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 631 | GAITHERSBG | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 632 | GAITHERSBG | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 633 | WASHINGTON ZONE 2 | District of Columbia | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 634 | LA PLATA | District of Columbia | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 635 | TOMPKINSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 636 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 637 | WSHNGTNZN3 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 638 | WSHNGTNZN3 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 639 | LAUREL236 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 640 | WALDORF | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 641 | WSNGTNZN10 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 642 | WSNGTNZN10 | Virginia | ADVANCED TELECOM SOLUTIONS, LLC | | More |
| 240 | 643 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 644 | WSHNGTNZN2 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 645 | WSHNGTNZN3 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 646 | LAUREL236 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 647 | CLEAR SPG | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 648 | KEEDYSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 649 | SMITHSBURG | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 650 | WSHNGTNZN3 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 650 | WSHNGTNZN3 | Maryland | INFOTELECOM, LLC - DC | | More |
| 240 | 651 | WASHINGTON ZONE 5 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 652 | MECHANCSVL | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 653 | WASHINGTON ZONE 4 | District of Columbia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 654 | GAITHERSBG | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 655 | KITZMILLER | Maryland | ONVOY, LLC - MD | | More |
| 240 | 656 | FREDERICK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 657 | WASHINGTON ZONE 13 | Virginia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 240 | 658 | GAITHERSBG | Maryland | VONAGE AMERICA LLC | | More |
| 240 | 659 | GAITHERSBURG | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 660 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 661 | MYERSVILLE | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 662 | WSHNGTNZN3 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 663 | MIDDLETOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 664 | DAMASCUS | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 665 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 666 | NANJEMOY | Maryland | ONVOY, LLC - MD | | More |
| 240 | 667 | WSHNGTNZN4 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 668 | DAMASCS236 | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 669 | WSNGTNZN11 | District of Columbia | COMCAST IP PHONE, LLC | | More |
| 240 | 670 | WSHNGTNZN3 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 671 | WSHNGTNZN2 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 672 | WSNGTNZN10 | District of Columbia | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 673 | WSHNGTNZN2 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 674 | FREDERICK | Maryland | METROPCS, INC. | | More |
| 240 | 675 | MYERSVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 676 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 677 | WSHNGTNZN5 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 678 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 679 | FRIENDSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 680 | FREDERICK | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 681 | BRANDYWINE | District of Columbia | BROADVIEW NETWORKS OF VIRGINIA, INC. - VA | | More |
| 240 | 682 | WALDORF | Maryland | STARPOWER COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 683 | GAITHERSBG | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 684 | WSNG236Z13 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 685 | BRANDYWINE | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 686 | GAITHERSBG | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 687 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 688 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 689 | WSNG236Z15 | Maryland | CSC WIRELESS, LLC | | More |
| 240 | 690 | GAITHERSBG | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 691 | WSHNGTNZN5 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 692 | WALDORF | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 693 | WALKERSVL | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 694 | WSHNGTNZN2 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 695 | WSHNGTNZN5 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 696 | WSHNGTNZN4 | Virginia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 697 | MECHANCSVL | Maryland | CORETEL MARYLAND, INC. - MD | | More |
| 240 | 698 | MYERSVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 699 | BUCKEYSTN | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 701 | WSHNGTNZN3 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 702 | MYERSVILLE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 703 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 704 | WSHNGTNZN3 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 705 | WSHNGTNZN3 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 706 | WSHNGTNZN3 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 707 | GAITHERSBURG | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 708 | LAUREL238 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 709 | LAUREL236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 710 | FREDERICK | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 240 | 712 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 713 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 713 | LAUREL236 | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 714 | HAGERSTOWN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 715 | WSNGTNZN10 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 716 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 717 | LEONARDTN | Maryland | ONVOY SPECTRUM, LLC | | More |
| 240 | 718 | LXTNPKGRML | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 719 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 720 | GAITHERSBG | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 721 | WSHNGTNZN5 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 722 | ASHTON236 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 723 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 724 | WSHNGTNZN6 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 725 | LXTNPKGRML | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 726 | WSHNGTNZN4 | Maryland | NUSO, LLC | | More |
| 240 | 727 | CUMBERLAND | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 728 | WSNGTNZN10 | Maryland | VONAGE AMERICA LLC | | More |
| 240 | 729 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 730 | HAGERSTOWN | Maryland | HD CARRIER LLC | | More |
| 240 | 731 | WSNGTNZN10 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 732 | MOUNT AIRY | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 733 | ASHTON236 | Maryland | FRACTEL, LLC | | More |
| 240 | 734 | SMITHSBURG | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 735 | BRUNSWICK | Maryland | NUSO, LLC | | More |
| 240 | 736 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 737 | WSHNGTNZN4 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 738 | HANCOCK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 739 | FREDERICK | Maryland | IP HORIZON LLC | | More |
| 240 | 740 | WALDORF | Maryland | ATLANTECH ONLINE, INC. - MD | | More |
| 240 | 741 | FREDERICK | Maryland | AIRESPRING, INC. | | More |
| 240 | 742 | WSNG238Z14 | Maryland | NUSO, LLC | | More |
| 240 | 743 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 744 | WSHNGTNZN2 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 745 | DAMASCS236 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 746 | BRANDYWINE | Maryland | AT&T - LOCAL | CLEC | More |
| 240 | 747 | WSNGTNZN11 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 748 | WSHNGTNZN3 | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - DC | CLEC | More |
| 240 | 749 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 750 | GAITHERSBG | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 751 | GAITHERSBG | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 752 | WSHNGTNZN2 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 753 | WSNGTNZN10 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 754 | WALDORF | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 755 | LAUREL238 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 756 | LA PLATA | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 757 | WSNG236Z13 | Virginia | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 758 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 759 | WSNG238Z15 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 760 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 761 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 762 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 763 | WSNG238Z15 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 764 | WSHNGTNZN4 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 765 | WSHNGTNZN5 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 766 | WSHNGTNZN6 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 767 | WSHNGTNZN5 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 768 | NANJEMOY | Maryland | ONVOY SPECTRUM, LLC | | More |
| 240 | 769 | KEEDYSVL | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 770 | WSHNGTNZN4 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 771 | WASHINGTON ZONE 13 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 772 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 773 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 774 | LONACONING | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 775 | WESTERNPT | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 776 | LA PLATA | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 777 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 778 | WSNGTNZN10 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 779 | ASHTON236 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 780 | GAITHERSBG | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 781 | WSHNGTNZN2 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 782 | DAMASCS236 | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 783 | WSHNGTNZN2 | Virginia | MTE, INC. DBA MTE PAGING NETWORK | WIRELESS PROV | More |
| 240 | 784 | MYERSVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 785 | OAKLAND | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 786 | LAUREL236 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 787 | BRANDYWINE | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 788 | WSHNGTNZN5 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 789 | WSNGTNZN10 | Maryland | ADVANCED TELECOM SOLUTIONS, LLC | | More |
| 240 | 790 | WSNG236Z13 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 791 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 792 | FREDERICK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 793 | GAITHERSBG | Maryland | METROPCS, INC. | | More |
| 240 | 794 | LXTNPKGRML | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 795 | WSHNGTNZN5 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 796 | WSNGTNZN10 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 797 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 798 | GAITHERSBG | Maryland | ONVOY, LLC - MD | | More |
| 240 | 799 | BRANDYWINE | Maryland | FRACTEL, LLC | | More |
| 240 | 800 | WSHNGTNZN2 | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 240 | 801 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 802 | WSHNGTNZN2 | Maryland | NUSO, LLC | | More |
| 240 | 803 | CUMBERLAND | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 804 | TOMPKINSVL | District of Columbia | ONVOY, LLC - MD | | More |
| 240 | 805 | GAITHERSBG | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 806 | INDIANHEAD | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 807 | CUMBERLAND | Maryland | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | WIRELESS PROV | More |
| 240 | 808 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 809 | WASHINGTON ZONE 3 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 810 | WASHINGTON ZONE 14 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 812 | POOLESVL | District of Columbia | GLOBAL CROSSING LOCAL SERVICES, INC. - MD | CLEC | More |
| 240 | 813 | GAITHERSBG | District of Columbia | BROADVIEW NETWORKS OF VIRGINIA, INC. - VA | | More |
| 240 | 814 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 815 | FREDERICK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 816 | KEEDYSVL | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 817 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 818 | MYERSVILLE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 819 | WILLIAMSPT | Maryland | ONVOY, LLC - MD | | More |
| 240 | 820 | ASHTON238 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 821 | WSHNGTNZN3 | Maryland | LIGHTWAVE COMMUNICATIONS, LLC - MD | | More |
| 240 | 822 | NEW MARKET | Maryland | ONVOY, LLC - MD | | More |
| 240 | 823 | BRANDYWINE | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 824 | FROSTBURG | Maryland | ONVOY, LLC - MD | | More |
| 240 | 825 | WSNGTNZN10 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 826 | WSNGTNZN10 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 827 | LONACONING | Maryland | ONVOY, LLC - MD | | More |
| 240 | 828 | WSHNGTNZN4 | Maryland | TELNYX LLC | | More |
| 240 | 829 | EMMITSBURG | Maryland | CORETEL MARYLAND, INC. - MD | | More |
| 240 | 830 | WSHNGTNZN5 | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 831 | FREDERICK | Maryland | ONVOY, LLC - MD | | More |
| 240 | 832 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 833 | WSNGTNZN11 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 834 | WASHINGTON ZONE 3 | District of Columbia | ONVOY, LLC - MD | | More |
| 240 | 835 | WSNGTNZN10 | District of Columbia | ONVOY SPECTRUM, LLC | | More |
| 240 | 836 | MT SAVAGE | Maryland | ONVOY, LLC - MD | | More |
| 240 | 837 | HUGHESVL | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 838 | WSHNGTNZN5 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 839 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 840 | WASHINGTON ZONE 16 | District of Columbia | ONVOY SPECTRUM, LLC | | More |
| 240 | 841 | LAUREL238 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 842 | WSNG238Z14 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 843 | WSNG238Z13 | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 844 | RIDGE | District of Columbia | ONVOY, LLC - MD | | More |
| 240 | 845 | WSNG236Z13 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 846 | WSNGTNZN16 | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 847 | WSHNGTNZN3 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 848 | GAITHERSBG | District of Columbia | METROPCS, INC. | | More |
| 240 | 849 | HAGERSTOWN | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 850 | HAGERSTOWN | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 851 | MCCOOLE | Maryland | ONVOY, LLC - MD | | More |
| 240 | 852 | MYERSVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 853 | LAUREL236 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 854 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 855 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 856 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 857 | WSHNGTNZN5 | Maryland | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | CLEC | More |
| 240 | 858 | WSHNGTNZN2 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 859 | ASHTON238 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 860 | LAUREL | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 240 | 861 | LAUREL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 862 | WASHINGTON ZONE 16 | District of Columbia | ONVOY, LLC - MD | | More |
| 240 | 863 | WSHNGTNZN3 | Maryland | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | CLEC | More |
| 240 | 864 | WSNGTNZN10 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 865 | WSNG238Z14 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 866 | LAUREL | Maryland | TERRA NOVA TELECOM INC. | | More |
| 240 | 867 | WSHNGTNZN3 | Maryland | COMMIO, LLC | | More |
| 240 | 868 | WSNGTNZN12 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 869 | CUMBERLAND | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 870 | MIDDLETOWN | Maryland | ONVOY, LLC - MD | | More |
| 240 | 871 | LXTNPKGRML | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 872 | WSHNGTNZN6 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 873 | BUCKEYSTN | Maryland | ONVOY, LLC - MD | | More |
| 240 | 874 | THURMONT | Maryland | ONVOY, LLC - MD | | More |
| 240 | 875 | MOUNT AIRY | Maryland | ONVOY, LLC - MD | | More |
| 240 | 876 | WSHNGTNZN2 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 877 | FREDERICK | Maryland | ONVOY, LLC - MD | | More |
| 240 | 878 | WASHINGTON ZONE 11 | Maryland | COMMIO, LLC | | More |
| 240 | 879 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 880 | WSNGTNZN11 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 881 | WSNG238Z13 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 882 | WSHNGTNZN5 | Maryland | METROPCS, INC. | | More |
| 240 | 883 | ASHTON236 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 884 | TOMPKINSVL | Maryland | ONVOY SPECTRUM, LLC | | More |
| 240 | 885 | WSNGTNZN10 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 886 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 887 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 888 | WSNGTNZN10 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 889 | WSNGTNZN10 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 890 | WSHNGTNZN5 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 891 | DAMASCS240 | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 892 | WSNG236Z15 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 893 | WSHNGTNZN3 | District of Columbia | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 894 | LXTNPKGRML | Maryland | DISH WIRELESS, LLC | | More |
| 240 | 895 | LXTNPKGRML | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 896 | HAGERSTOWN | Maryland | DISH WIRELESS, LLC | | More |
| 240 | 897 | WSNGTNZN16 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 898 | WSHNGTNZN4 | District of Columbia | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 899 | WSHNGTNZN2 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 900 | WSHNGTNZN4 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 901 | LA PLATA | Maryland | CENTURYLINK COMMUNICATIONS, LLC | | More |
| 240 | 902 | DAMASCS240 | Maryland | TWILIO INTERNATIONAL, INC. | | More |
| 240 | 903 | INDIANHEAD | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 904 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 905 | BRANDYWINE | Maryland | METROPCS, INC. | | More |
| 240 | 906 | LAUREL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 907 | WSNGTNZN10 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 908 | WALKERSVL | Maryland | ONVOY, LLC - MD | | More |
| 240 | 909 | WASHINGTON ZONE 10 | Maryland | METROPCS, INC. | | More |
| 240 | 910 | HUGHESVILLE | Maryland | RADIANTIQ LLC | | More |
| 240 | 912 | GAITHERSBG | Virginia | US LEC OF MARYLAND, INC. | CLEC | More |
| 240 | 913 | DAMASCS240 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 914 | HIGHFIELD | Maryland | DISH WIRELESS, LLC | | More |
| 240 | 915 | NEW MARKET | Maryland | TELNYX LLC | | More |
| 240 | 916 | CUMBERLAND | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 917 | WASHINGTON ZONE 14 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 918 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 919 | WASHINGTON ZONE 5 | Virginia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 920 | CUMBERLAND | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 921 | WSNGTNZN10 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 922 | WSNGTNZN11 | Maryland | FRACTEL, LLC | | More |
| 240 | 923 | WSHNGTNZN6 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 924 | MOUNT AIRY | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 925 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 926 | HUGHESVL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 927 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 928 | MYERSVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 929 | WSNG236Z14 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 930 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 931 | FREDERICK | Maryland | NUSO, LLC | | More |
| 240 | 932 | WSNG236Z14 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 933 | BUCKEYSTN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 240 | 934 | MIDDLETOWN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 240 | 935 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 936 | WSHNGTNZN4 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 937 | GAITHERSBG | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 938 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 939 | WSNGTNZN11 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 940 | WSHNGTNZN4 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 941 | WSHNGTNZN2 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 942 | BITTINGER | Maryland | ONVOY, LLC - MD | | More |
| 240 | 943 | FROSTBURG | Maryland | COMCAST IP PHONE, LLC | | More |
| 240 | 944 | WESTERNPT | Maryland | ONVOY, LLC - MD | | More |
| 240 | 945 | WSHNGTNZN3 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 946 | WSNG236Z14 | Maryland | FRACTEL, LLC | | More |
| 240 | 947 | MYERSVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 948 | LEONARDTN | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 949 | WSNGTNZN16 | District of Columbia | CAVALIER EAST, LLC - MD | CLEC | More |
| 240 | 951 | HAGERSTOWN | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 952 | HAGERSTOWN | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 953 | HAGERSTOWN | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 954 | HAGERSTOWN | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 955 | LA PLATA | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 956 | WSHNGTNZN2 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 957 | DAMASCS236 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 960 | WSHNGTNZN4 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 961 | POOLESVL | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 962 | LAUREL236 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 963 | WSHNGTNZN3 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 240 | 964 | CUMBERLAND | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 240 | 965 | WSNG236Z13 | District of Columbia | PAETEC COMMUNICATIONS, INC. - MD | CLEC | More |
| 240 | 966 | WSNGTNZN16 | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 240 | 967 | CUMBERLAND | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 968 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 969 | NANJEMOY | Maryland | COMMIO, LLC | | More |
| 240 | 970 | WSNGTNZN12 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 971 | WASHINGTON ZONE 13 | District of Columbia | CENTURYLINK COMMUNICATIONS, LLC | | More |
| 240 | 972 | LAUREL238 | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 973 | WSNGTNZN12 | Maryland | METROPCS, INC. | | More |
| 240 | 974 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 975 | LAUREL238 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 976 | DAMASCS236 | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 240 | 977 | WSHNGTNZN6 | Maryland | ONVOY, LLC - MD | | More |
| 240 | 978 | ASHTON236 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 979 | CUMBERLAND | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 980 | LEONARDTN | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 981 | GAITHERSBG | Maryland | NUSO, LLC | | More |
| 240 | 982 | GAITHERSBG | Maryland | ONVOY, LLC - MD | | More |
| 240 | 983 | HAGERSTOWN | Maryland | NUSO, LLC | | More |
| 240 | 984 | MECHANICSVILLE | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 240 | 985 | WILLIAMSPT | Maryland | CENTURYLINK COMMUNICATIONS, LLC | | More |
| 240 | 986 | NANJEMOY | District of Columbia | ONVOY, LLC - MD | | More |
| 240 | 987 | WSNGTNZN10 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 988 | WSHNGTNZN3 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 989 | MYERSVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 990 | LAUREL236 | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 240 | 991 | WASHINGTON ZONE 13 | District of Columbia | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 992 | WSNGTNZN10 | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 240 | 993 | INDIANHEAD | District of Columbia | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 240 | 994 | WSNGTNZN10 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 995 | FLINTSTONE | Maryland | ONVOY, LLC - MD | | More |
| 240 | 996 | BRUNSWICK | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 240 | 997 | WSHNGTNZN3 | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 240 | 998 | HANCOCK | Maryland | CENTURYLINK COMMUNICATIONS, LLC | | More |
| 240 | 999 | WSHNGTNZN3 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
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