Area
Code | Prefix | City/Switch Name
(Click for city search) | State/Prov.
Area Map | Telephone Company
Web link | Telco
Type | More
Info |
|---|
| 667 | 200 | COLUMBIA | Maryland | ONVOY, LLC - MD | | More |
| 667 | 201 | BEL AIR | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 202 | ELKTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 203 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 204 | ANNAPOLIS | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
| 667 | 205 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 206 | BALTIMORE | Maryland | METROPCS, INC. | | More |
| 667 | 207 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 208 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 209 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 210 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 212 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 213 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 214 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 215 | ELKTON | Maryland | COMCAST IP PHONE, LLC | | More |
| 667 | 216 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 217 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 218 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 219 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 220 | COLUMBIA | Maryland | ONVOY, LLC - MD | | More |
| 667 | 221 | TOWSON | Maryland | TELNYX LLC | | More |
| 667 | 222 | ARGRGBSNIS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 223 | BALTIMORE | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 224 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 225 | BALTIMORE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 226 | STMICHAELS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 227 | SALISBURY | Maryland | ATLANTECH ONLINE, INC. - MD | | More |
| 667 | 228 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 229 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 230 | CENTREVL | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 231 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 232 | GLENBURNIE | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 233 | BALTIMORE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 667 | 234 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 235 | SALISBURY | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 236 | PERRYVILLE | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 237 | WEST RIVER | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 238 | PRESTON | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 239 | BALTIMORE | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 240 | COLUMBIA | Maryland | BARR TELL USA, INC. | | More |
| 667 | 241 | RIDGELY | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 242 | ROCK HALL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 243 | OXFORD | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 244 | STILL POND | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 245 | CECILTON | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 246 | CENTREVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 247 | CHESAPKECY | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 248 | BALTIMORE | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 249 | GALENA | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 250 | BALTIMORE | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 251 | TOWSON | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 252 | SALISBURY | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 253 | SALISBURY | Maryland | NUSO, LLC | | More |
| 667 | 254 | CHESTERTN | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 255 | HILLSBORO | Maryland | ONVOY, LLC - MD | | More |
| 667 | 256 | ABERDEEN | Maryland | EXIANT COMMUNICATIONS LLC | | More |
| 667 | 257 | COLUMBIA | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 258 | BALTIMORE | Maryland | AIRESPRING, INC. | | More |
| 667 | 259 | REISTERSTN | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 260 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 261 | COLUMBIA | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 262 | BALTIMORE | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 263 | DUNDALK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 264 | DELMAR | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 265 | VIENNA | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 667 | 266 | SALISBURY | Maryland | COMMIO, LLC | | More |
| 667 | 267 | ANNAPOLIS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 268 | DARLINGTON | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 269 | ELKTON | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 270 | ANNAPOLIS | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 271 | SALISBURY | Maryland | EXIANT COMMUNICATIONS LLC | | More |
| 667 | 272 | WESTMINSTR | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 273 | PIKESVILLE | Maryland | CSC WIRELESS, LLC | | More |
| 667 | 274 | ELKRIDGE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 275 | TOWSON | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 276 | BEL AIR | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 277 | SHERWD FOR | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 278 | TOWSON | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 279 | BISHOPVL | Maryland | AT&T - LOCAL | CLEC | More |
| 667 | 280 | ELLICOTTCY | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 281 | SALISBURY | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 282 | TILGHMAN | Maryland | ONVOY, LLC - MD | | More |
| 667 | 283 | FORK | Maryland | AT&T - LOCAL | CLEC | More |
| 667 | 284 | BALTIMORE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 285 | HURLOCK | Maryland | ONVOY, LLC - MD | | More |
| 667 | 286 | SALISBURY | Maryland | HD CARRIER LLC | | More |
| 667 | 287 | BISHOPVL | Maryland | NUSO, LLC | | More |
| 667 | 288 | BERLIN | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 289 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 290 | BALTIMORE | Maryland | IP HORIZON LLC | | More |
| 667 | 291 | MILLINGTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 292 | SALISBURY | Maryland | IP HORIZON LLC | | More |
| 667 | 293 | SHARPTOWN | Maryland | ONVOY, LLC - MD | | More |
| 667 | 294 | TOWSON | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 295 | CROFTON | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 296 | REISTERSTN | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 297 | EDGEWOOD | Maryland | METROPCS, INC. | | More |
| 667 | 298 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 299 | ANNAPOLIS | Maryland | HD CARRIER LLC | | More |
| 667 | 300 | COLUMBIA | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 301 | PRINCEFRCK | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 302 | CECILTON | Maryland | TELNYX LLC | | More |
| 667 | 303 | BALTIMORE | Maryland | NUSO, LLC | | More |
| 667 | 304 | ESSEX | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 305 | PIKESVILLE | Maryland | NUSO, LLC | | More |
| 667 | 306 | BALTIMORE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 307 | CROFTON | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 308 | TOWSON | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 309 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 310 | PARKVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 312 | BALTIMORE | Maryland | ATLANTECH ONLINE, INC. - MD | | More |
| 667 | 313 | COLUMBIA | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 314 | WESTMINSTR | Maryland | BARR TELL USA, INC. | | More |
| 667 | 315 | BEL AIR | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 316 | OXFORD | Maryland | TELNYX LLC | | More |
| 667 | 317 | PRINCEANNE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 318 | COCKEYSVL | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 319 | CHESTERTN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 320 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 321 | PRINCEFRCK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 322 | WATERLO236 | Maryland | ONVOY, LLC - MD | | More |
| 667 | 323 | QUEENSTOWN | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 324 | RANDALLSTN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 325 | GLENBURNIE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 326 | CHURCHHILL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 327 | CAMBRIDGE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 328 | ESSEX | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 329 | PARKTON | Maryland | TELNYX LLC | | More |
| 667 | 330 | SALISBURY | Maryland | US LEC OF MARYLAND, INC. | CLEC | More |
| 667 | 331 | TOWSON | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 332 | NEWWINDSOR | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 333 | ARGRGBSNIS | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 667 | 334 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 335 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 336 | BEL AIR | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 337 | CENTREVL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 338 | CROFTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 339 | SYKESVILLE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 340 | CHURCHVL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 341 | DELMAR | Maryland | ONVOY, LLC - MD | | More |
| 667 | 342 | PRESTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 343 | CAMBRIDGE | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | CLEC | More |
| 667 | 344 | CHASE | Maryland | TELNYX LLC | | More |
| 667 | 345 | CATONSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 346 | SALISBURY | Maryland | CSC WIRELESS, LLC | | More |
| 667 | 347 | FEDERALSBG | Maryland | ONVOY, LLC - MD | | More |
| 667 | 348 | RIDGELY | Maryland | ONVOY, LLC - MD | | More |
| 667 | 349 | STILL POND | Maryland | ONVOY, LLC - MD | | More |
| 667 | 350 | WINGATE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 351 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 352 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 353 | CARDIFF | Maryland | CORETEL MARYLAND, INC. - MD | | More |
| 667 | 354 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 355 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 356 | SEVERN | Maryland | ONVOY, LLC - MD | | More |
| 667 | 357 | GREENSBORO | Maryland | ONVOY, LLC - MD | | More |
| 667 | 358 | EASTON | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 359 | COLUMBIA | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 360 | ODENTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 361 | CHURCHHILL | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 362 | ANNAPOLIS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 363 | SHERWD FOR | Maryland | ONVOY, LLC - MD | | More |
| 667 | 364 | STEVENSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 365 | CHESAPKECY | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 366 | HAMPSTEAD | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 367 | WESTMINSTR | Maryland | BALTIMORE-WASHINGTON TELEPHONE (BWT) | CLEC | More |
| 667 | 368 | ELKTON | Maryland | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | WIRELESS PROV | More |
| 667 | 369 | CATONSVL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 370 | PARKTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 371 | ELLICOTTCY | Maryland | METROPCS, INC. | | More |
| 667 | 372 | CAMBRIDGE | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 373 | NORTHBEACH | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 374 | WATERLO238 | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 375 | CHASE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 376 | OXFORD | Maryland | ONVOY, LLC - MD | | More |
| 667 | 377 | ROCK HALL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 378 | ESSEX | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 379 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 380 | ANNAPOLIS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 381 | PARKVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 382 | WINGATE | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 383 | TOWSON | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 384 | SALISBURY | Maryland | DISH WIRELESS, LLC | | More |
| 667 | 385 | SOLOMONS | Maryland | DISH WIRELESS, LLC | | More |
| 667 | 386 | ARBUTUS | Maryland | METROPCS, INC. | | More |
| 667 | 387 | PERRYVILLE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 388 | SEVERN | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 389 | CAMBRIDGE | Maryland | COMMIO, LLC | | More |
| 667 | 390 | RANDALLSTN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 391 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 392 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 393 | MILLERSVL | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 394 | NEWWINDSOR | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 395 | CARDIFF | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 396 | PT DEPOSIT | Maryland | ONVOY, LLC - MD | | More |
| 667 | 397 | SOLOMONS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 398 | PT DEPOSIT | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 399 | UNION BDG | Maryland | HD CARRIER LLC | | More |
| 667 | 400 | BALTIMORE | Maryland | BARR TELL USA, INC. | | More |
| 667 | 401 | BALTIMORE | Maryland | LEVEL 3 COMMUNICATIONS, LLC - MD | CLEC | More |
| 667 | 402 | BALTIMORE | Maryland | TELNYX LLC | | More |
| 667 | 403 | TOWSON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 404 | PRINCEFRCK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 405 | GLENBURNIE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 406 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 407 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 408 | ANNAPOLIS | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 409 | PARKVILLE | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 410 | SEVERN | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 412 | EASTON | Maryland | NUSO, LLC | | More |
| 667 | 413 | ARGRGBSNIS | Maryland | NUSO, LLC | | More |
| 667 | 414 | BALTIMORE | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 415 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 416 | ESSEX | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 417 | GLENBURNIE | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 418 | GREENSBORO | Maryland | COMCAST IP PHONE, LLC | | More |
| 667 | 419 | CATONSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 420 | FEDERALSBG | Maryland | DISH WIRELESS, LLC | | More |
| 667 | 421 | COLUMBIA | Maryland | TELNYX LLC | | More |
| 667 | 422 | BALTIMORE | Maryland | CENTURYLINK COMMUNICATIONS, LLC | | More |
| 667 | 423 | ANNAPOLIS | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 424 | ODENTON | Maryland | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | CLEC | More |
| 667 | 425 | BALTIMORE | Maryland | NUSO, LLC | | More |
| 667 | 426 | TANEYTOWN | Maryland | ONVOY, LLC - MD | | More |
| 667 | 427 | WEST RIVER | Maryland | ONVOY, LLC - MD | | More |
| 667 | 428 | SALISBURY | Maryland | NUSO, LLC | | More |
| 667 | 429 | PIKESVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 430 | PIKESVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 431 | ARBUTUS | Maryland | METROPCS, INC. | | More |
| 667 | 432 | CATONSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 433 | CATONSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 434 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 435 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 436 | TOWSON | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 437 | BALTIMORE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 438 | CATONSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 439 | PIKESVILLE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 440 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 441 | PARKVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 442 | ESSEX | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 443 | CHASE | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 444 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 445 | CATONSVL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 446 | ELKRIDGE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 447 | COLUMBIA | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 448 | REISTERSTN | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 449 | PRESTON | Maryland | COMMIO, LLC | | More |
| 667 | 450 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 451 | FORK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 452 | CATONSVL | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 453 | PRINCEFRCK | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 454 | BEL AIR | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 455 | EDGEWOOD | Maryland | VONAGE AMERICA LLC | | More |
| 667 | 456 | DUNDALK | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 457 | CHURCHHILL | Maryland | COMMIO, LLC | | More |
| 667 | 458 | ANNAPOLIS | Maryland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | WIRELESS PROV | More |
| 667 | 459 | OXFORD | Maryland | COMMIO, LLC | | More |
| 667 | 460 | PIKESVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 461 | BALTIMORE | Maryland | FIVE9, INC. | | More |
| 667 | 462 | ELKTON | Maryland | DISH WIRELESS, LLC | | More |
| 667 | 463 | DARLINGTON | Maryland | FIVE9, INC. | | More |
| 667 | 464 | BALTIMORE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 465 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 466 | HAVREGRACE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 467 | DENTON | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 468 | NANTICOKE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 469 | BEL AIR | Maryland | ONVOY, LLC - MD | | More |
| 667 | 470 | GLENBURNIE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 471 | PIKESVILLE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 472 | PRINCEANNE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 473 | SOLOMONS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 474 | ARGRGBSNIS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 475 | CROFTON | Maryland | ONVOY, LLC - MD | | More |
| 667 | 476 | GLENWOOD | Maryland | ONVOY, LLC - MD | | More |
| 667 | 477 | HAMPSTEAD | Maryland | ONVOY, LLC - MD | | More |
| 667 | 478 | SYKESVILLE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 479 | ELLICOTTCY | Maryland | ONVOY, LLC - MD | | More |
| 667 | 480 | WATERLO236 | Maryland | ONVOY, LLC - MD | | More |
| 667 | 481 | ABERDEEN | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 483 | DEALISLAND | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 500 | ANNAPOLIS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 526 | CENTREVL | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 529 | HURLOCK | Maryland | FRACTEL, LLC | | More |
| 667 | 545 | WARWICK | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 566 | STEVENSVL | Maryland | COMMIO, LLC | | More |
| 667 | 567 | HAVREGRACE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 576 | JARRETTSVL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 577 | ELKTON | Maryland | FRACTEL, LLC | | More |
| 667 | 600 | BALTIMORE | Maryland | WORLDCALL INTERCONNECT INC. | | More |
| 667 | 622 | PIKESVILLE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 626 | CATONSVL | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 627 | ANNAPOLIS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 644 | SEVERNA PK | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 646 | ANNAPOLIS | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 647 | NORTH EAST | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 653 | BRYNPKLNCM | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 656 | EDGEWOOD | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 657 | CHASE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 660 | MARION | Maryland | ONVOY, LLC - MD | | More |
| 667 | 661 | SNOW HILL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 662 | SMITH IS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 663 | OCEAN CITY | Maryland | ONVOY, LLC - MD | | More |
| 667 | 664 | TRAPPE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 665 | HILLSBORO | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 666 | WEST RIVER | Maryland | ONVOY, LLC - MD | | More |
| 667 | 668 | FALLSTON | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 669 | GALENA | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 670 | SUDLERSVL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 676 | WILLARDS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 677 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 678 | COLUMBIA | Maryland | ONVOY, LLC - MD | | More |
| 667 | 686 | ELLICOTTCY | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 687 | WARWICK | Maryland | ONVOY, LLC - MD | | More |
| 667 | 688 | PARKVILLE | Maryland | FRACTEL, LLC | | More |
| 667 | 693 | VIENNA | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 701 | ELKRIDGE | Maryland | NEW CINGULAR WIRELESS PCS, LLC - DC | WIRELESS PROV | More |
| 667 | 706 | ELKTON | Maryland | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | WIRELESS PROV | More |
| 667 | 722 | GLENWOOD | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 727 | SUDLERSVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 737 | PERRYVILLE | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 743 | QUEENSTOWN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 746 | GLENWOOD | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 755 | PIKESVILLE | Maryland | QUANTUM TELECOMMUNICATIONS, INC. - MD | CLEC | More |
| 667 | 758 | SILVER RUN | Maryland | FRACTEL, LLC | | More |
| 667 | 766 | STEVENSVL | Maryland | ONVOY, LLC - MD | | More |
| 667 | 767 | STMICHAELS | Maryland | ONVOY, LLC - MD | | More |
| 667 | 770 | BALTIMORE | Maryland | AIRUS, INC. - MD | | More |
| 667 | 771 | BALTIMORE | Maryland | WIDE VOICE, LLC - MD | | More |
| 667 | 772 | SPARKSGLNC | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 775 | MILLINGTON | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 776 | BALTIMORE | Maryland | HD CARRIER LLC | | More |
| 667 | 777 | SEVERNA PK | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 778 | SPARROWSPT | Maryland | ONVOY SPECTRUM, LLC | | More |
| 667 | 786 | COLUMBIA | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 788 | WESTMINSTR | Maryland | QUANTUM TELECOMMUNICATIONS, INC. - MD | CLEC | More |
| 667 | 800 | SALISBURY | Maryland | ONVOY, LLC - MD | | More |
| 667 | 801 | BALTIMORE | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 667 | 802 | CATONSVL | Maryland | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | WIRELESS PROV | More |
| 667 | 803 | SOLOMONS | Maryland | BANDWIDTH.COM CLEC, LLC - MD | | More |
| 667 | 808 | EASTON | Maryland | PEERLESS NETWORK OF MARYLAND, LLC | | More |
| 667 | 810 | SALISBURY | Maryland | RADIANTIQ LLC | | More |
| 667 | 812 | WATERLO236 | Maryland | VERIZON MARYLAND, INC. | RBOC | More |
| 667 | 824 | EDGEWOOD | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 827 | BERLIN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 832 | BRYNPKLNCM | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 837 | PT DEPOSIT | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 842 | WOODLAWN | Maryland | FRACTEL, LLC | | More |
| 667 | 843 | DEALISLAND | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 846 | COCKEYSVL | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 848 | ABERDEEN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 853 | POCOMOKE | Maryland | CORETEL MARYLAND, INC. - MD | | More |
| 667 | 855 | SALISBURY | Maryland | TERRA NOVA TELECOM INC. | | More |
| 667 | 856 | DUNDALK | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 866 | DARLINGTON | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 867 | BALTIMORE | Maryland | COMMIO, LLC | | More |
| 667 | 868 | CRISFIELD | Maryland | CHARTER IP ENABLED SERVICES, LLC | | More |
| 667 | 876 | ANNAPOLIS | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 877 | PIKESVILLE | Maryland | COMMIO, LLC | | More |
| 667 | 887 | WORTHINGTN | Maryland | ONVOY, LLC - MD | | More |
| 667 | 888 | BALTIMORE | Maryland | ONVOY, LLC - MD | | More |
| 667 | 890 | ODENTON | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 891 | ODENTON | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 892 | ODENTON | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 893 | ODENTON | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 894 | ODENTON | Maryland | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | CAP | More |
| 667 | 895 | BALTIMORE | Maryland | TWILIO INTERNATIONAL, INC. | | More |
| 667 | 897 | CHESAPKECY | Maryland | TWILIO INTERNATIONAL, INC. | | More |
| 667 | 899 | BALTIMORE | Maryland | FRACTEL, LLC | | More |
| 667 | 900 | BALTIMORE | Maryland | TERRA NOVA TELECOM INC. | | More |
| 667 | 910 | BALTIMORE | Maryland | RADIANTIQ LLC | | More |
| 667 | 925 | BEL AIR | Maryland | CORETEL MARYLAND, INC. - MD | | More |
| 667 | 930 | BALTIMORE | Maryland | RCLEC, INC. | | More |
| 667 | 942 | ABERDEEN | Maryland | TON80 COMMUNICATIONS, LLC | | More |
| 667 | 946 | CHURCHVL | Maryland | CORE COMMUNICATIONS, INC.- MD | CLEC | More |
| 667 | 962 | NORTHBEACH | Maryland | ONVOY, LLC - MD | | More |
| 667 | 966 | NEWWINDSOR | Maryland | ONVOY, LLC - MD | | More |
| 667 | 967 | GLENBURNIE | Maryland | BARR TELL USA, INC. | | More |
| 667 | 977 | SALISBURY | Maryland | FRACTEL, LLC | | More |
| 667 | 999 | ELKRIDGE | Maryland | ONVOY, LLC - MD | | More |
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