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Area Code (240) Maryland, USA

Area Code:240
State: Maryland (MD)
Country:United States
Main Cities:Mount Rainier, MD
Rockville, MD
Silver Spring, MD
Frederick, MD
Gaithersburg, MD
Bethesda, MD

Area Code (240) serves 59 Cities:

Mount Rainier, Rockville, Silver Spring, Frederick, Gaithersburg, Bethesda, Waldorf, Laurel, Chevy Chase, Beltsville, Hagerstown, Cabin John, Oxon Hill, Leonardtown, Sandy Spring, Cumberland, Damascus, Kensington, College Park, Hyattsville, Capitol Heights, Upper Marlboro, Glenn Dale, Callaway, Mechanicsville, Indian Head, Hughesville, La Plata, Clinton, Newburg, Oakland, Poolesville, Ridge, Brandywine, Nanjemoy, Myersville, Columbia, Greenbelt, Lexington Park, Adamstown, Hancock, Mount Airy, Emmitsburg, Ashton, Frostburg, Williamsport, Thurmont, Odenton, Tall Timbers, Middletown, Mccoole, Highfield, Baltimore, Grantsville, Ijamsville, Crofton, Temple Hills, Clarksville and Smithsburg located in the state of Maryland, United States.

Area Code (240) Maryland Counties:

Allegany, Anne Arundel, Carroll, Charles, Frederick, Garrett, Howard, Montgomery, Prince Georges, Saint Marys and Washington.
Area Code 240 List of Prefixes
PrefixLocationCarrier
(240) 200 Mount RainierMDBandwidth.com - CLEC
(240) 201 RidgeMDPeerless Network of The District of Columbia, Dc
(240) 203 HagerstownMDSprint Spectrum L.P.
(240) 204 BethesdaMDCellco Partnership DBA Verizon
(240) 205 Cabin JohnMDNew Cingular Wireless PCS, LLC
(240) 206 Glenn DaleMDXO Communications Maryland
(240) 207 DamascusMDCavalier East LLC
(240) 208 La PlataMDPeerless Network of The District of Columbia, Dc
(240) 209 Indian HeadMDPeerless Network of The District of Columbia, Dc
(240) 210 WaldorfMDNew Cingular Wireless PCS, LLC
(240) 212 OaklandMDCore Communications
(240) 213 WaldorfMDPeerless Network of The District of Columbia, Dc
(240) 214 MechanicsvilleMDPeerless Network of The District of Columbia, Dc
(240) 215 FrederickMDTelcove Operations
(240) 216 WaldorfMDSprint Spectrum L.P.
(240) 217 HagerstownMDOmnipoint Communications Cap Operations
(240) 218 NanjemoyMDPeerless Network of The District of Columbia, Dc
(240) 220 PoolesvilleMDPeerless Network of Maryland
(240) 221 RockvilleMDVerizon Maryland
(240) 222 WaldorfMDCavalier Telephone Mid-Atlantic
(240) 223 Mount RainierMDAllegiance Telecom
(240) 224 GaithersburgMDCellco Partnership DBA Verizon
(240) 225 FrederickMDCore Communications
(240) 228 LaurelMDVerizon Maryland
(240) 229 WaldorfMDBroadwing Communications. LLC
(240) 230 HughesvilleMDGlobal Crossing Local Services - MD
(240) 231 HagerstownMDCore Communications
(240) 232 Mount RainierMDBroadwing Communications. LLC
(240) 233 NewburgMDTeleport Communications America - DC
(240) 234 Mount RainierMDCellco Partnership DBA Verizon
(240) 235 BethesdaMDPaetec Communications
(240) 236 FrederickMDVerizon Maryland
(240) 237 CallawayMDTeleport Communications America - DC
(240) 238 RockvilleMDPaetec Communications
(240) 239 LeonardtownMDCore Communications
(240) 241 Chevy ChaseMDStarpower Communications
(240) 242 KensingtonMDStarpower Communications
(240) 243 GaithersburgMDAllegiance Telecom
(240) 244 Mount RainierMDStarpower Communications
(240) 245 Glenn DaleMDStarpower Communications
(240) 246 GaithersburgMDStarpower Communications
(240) 247 Mount RainierMDAllegiance Telecom
(240) 248 RidgeMDPeerless Network of Maryland
(240) 249 MechanicsvilleMDTeleport Communications America - DC
(240) 250 BrandywineMDPeerless Network of Maryland
(240) 251 HighfieldMDCore Communications
(240) 252 GaithersburgMDLevel 3 Communications
(240) 253 Mount RainierMDGlobal Crossing Local Services - MD
(240) 254 HughesvilleMDTeleport Communications America - DC
(240) 255 PoolesvilleMDPeerless Network of Maryland
(240) 256 LeonardtownMDTeleport Communications America - DC
(240) 257 NanjemoyMDTeleport Communications America - DC
(240) 258 RidgeMDTeleport Communications America - DC
(240) 260 Mount RainierMDAllegiance Telecom
(240) 262 CallawayMDSprint Spectrum L.P.
(240) 263 BethesdaMDSprint Spectrum L.P.
(240) 264 BeltsvilleMDVerizon Maryland
(240) 265 BethesdaMDSprint Spectrum L.P.
(240) 266 Mount RainierMDPeerless Network of Maryland
(240) 268 RockvilleMDAllegiance Telecom
(240) 269 Mount RainierMDPeerless Network of Maryland
(240) 270 WaldorfMDCellco Partnership DBA Verizon
(240) 271 BethesdaMDNew Cingular Wireless PCS, LLC
(240) 272 BethesdaMDSprint Spectrum L.P.
(240) 273 Mount RainierMDBroadwing Communications. LLC
(240) 274 BethesdaMDNew Cingular Wireless PCS, LLC
(240) 275 GrantsvilleMDCore Communications
(240) 276 RockvilleMDVerizon Maryland
(240) 277 BethesdaMDSprint Spectrum L.P.
(240) 278 LaurelMDCellco Partnership DBA Verizon
(240) 279 WaldorfMDCore Communications
(240) 280 LaurelMDComcast Phone of Northern Maryland
(240) 281 BethesdaMDNew Cingular Wireless PCS, LLC
(240) 282 MechanicsvilleMDPeerless Network of Maryland
(240) 283 KensingtonMDPaetec Communications
(240) 284 FrostburgMDLevel 3 Communications
(240) 285 FrederickMDCellco Partnership DBA Verizon
(240) 286 BethesdaMDSprint Spectrum L.P.
(240) 287 HancockMDCore Communications
(240) 288 ThurmontMDComcast Phone of Northern Maryland
(240) 289 Oxon HillMDCavalier Telephone Mid-Atlantic
(240) 290 Mount RainierMDAllegiance Telecom
(240) 291 HagerstownMDNew Cingular Wireless PCS, LLC
(240) 292 KensingtonMDVerizon Maryland
(240) 293 Mount RainierMDStarpower Communications
(240) 294 LaurelMDXO Communications Maryland
(240) 295 LaurelMDCavalier Telephone Mid-Atlantic
(240) 296 HyattsvilleMDCavalier Telephone Mid-Atlantic
(240) 297 College ParkMDLevel 3 Communications
(240) 298 LeonardtownMDCellco Partnership DBA Verizon
(240) 299 WaldorfMDSprint Spectrum L.P.
(240) 300 WaldorfMDCellco Partnership DBA Verizon
(240) 303 ClintonMDCavalier Telephone Mid-Atlantic
(240) 304 Mount RainierMDSprint Spectrum L.P.
(240) 305 BeltsvilleMDSprint Spectrum L.P.
(240) 306 GaithersburgMDAllegiance Telecom
(240) 307 EmmitsburgMDAT&T Local
(240) 308 DamascusMDNew Cingular Wireless PCS, LLC
(240) 309 LeonardtownMDCellco Partnership DBA Verizon
(240) 310 HagerstownMDUscoc of Cumberland DBA United States Cel Md
(240) 312 Capitol HeightsMDCavalier Telephone Mid-Atlantic
(240) 313 HagerstownMDVerizon Maryland
(240) 314 RockvilleMDVerizon Maryland
(240) 315 FrederickMDVerizon Maryland
(240) 316 Chevy ChaseMDSprint Spectrum L.P.
(240) 317 CallawayMDStarpower Communications
(240) 318 ClintonMDVerizon Maryland
(240) 319 ColumbiaMDCellco Partnership DBA Verizon
(240) 320 WaldorfMDCavalier East LLC
(240) 321 OaklandMDUscoc of Cumberland DBA United States Cel Md
(240) 322 MccooleMDCore Communications
(240) 323 EmmitsburgMDCore Communications
(240) 324 ClarksvilleMDYMAX Communications Corp.
(240) 325 DamascusMDCore Communications
(240) 326 Upper MarlboroMDCavalier Telephone Mid-Atlantic
(240) 327 GaithersburgMDCore Communications
(240) 328 RockvilleMDVerizon Maryland
(240) 329 HagerstownMDLevel 3 Communications
(240) 330 Cabin JohnMDSprint Spectrum L.P.
(240) 331 Mount RainierMDPeerless Network of Maryland
(240) 332 NewburgMDPeerless Network of Maryland
(240) 333 Mount RainierMDCavalier East LLC
(240) 334 Mount RainierMDGlobal Crossing Local Services - MD
(240) 335 Glenn DaleMDCavalier Telephone Mid-Atlantic
(240) 336 BethesdaMDCore Communications
(240) 337 Mount RainierMDPeerless Network of Maryland
(240) 338 Silver SpringMDCellco Partnership DBA Verizon
(240) 339 Upper MarlboroMDCavalier East LLC
(240) 340 BethesdaMDSprint Spectrum L.P.
(240) 341 AdamstownMDMCI Worldcom Communications
(240) 342 Sandy SpringMDStarpower Communications
(240) 343 HancockMDCellco Partnership DBA Verizon
(240) 344 FrederickMDNew Cingular Wireless PCS, LLC
(240) 345 Sandy SpringMDLevel 3 Communications
(240) 346 WaldorfMDSprint Spectrum L.P.
(240) 347 HagerstownMDBandwidth.com - CLEC
(240) 348 Oxon HillMDLevel 3 Communications
(240) 349 La PlataMDGlobal Crossing Local Services - MD
(240) 350 BeltsvilleMDSprint Spectrum L.P.
(240) 351 BeltsvilleMDSprint Spectrum L.P.
(240) 352 La PlataMDPeerless Network of Maryland
(240) 353 BeltsvilleMDSprint Spectrum L.P.
(240) 354 BeltsvilleMDSprint Spectrum L.P.
(240) 355 BeltsvilleMDSprint Spectrum L.P.
(240) 356 FrederickMDLevel 3 Communications
(240) 357 FrederickMDCellco Partnership DBA Verizon
(240) 358 DamascusMDPeerless Network of Maryland
(240) 359 Indian HeadMDPeerless Network of Maryland
(240) 360 LaurelMDOmnipoint Communications Cap Operations
(240) 361 GaithersburgMDCavalier Telephone Mid-Atlantic
(240) 362 CumberlandMDVerizon Maryland
(240) 363 KensingtonMDGlobal Naps South
(240) 364 GaithersburgMDCavalier East LLC
(240) 365 DamascusMDBaltimore-washington Telephone (BWT)
(240) 366 WilliamsportMDAT&T Local
(240) 367 FrederickMDSprint Spectrum L.P.
(240) 368 WaldorfMDPeerless Network of Maryland
(240) 369 Mount AiryMDCore Communications
(240) 370 BethesdaMDSprint Spectrum L.P.
(240) 371 Mount RainierMDPeerless Network of Maryland
(240) 372 GaithersburgMDSprint Spectrum L.P.
(240) 373 OdentonMDVerizon Maryland
(240) 374 LaurelMDGlobal Crossing Local Services - MD
(240) 375 Capitol HeightsMDSprint Spectrum L.P.
(240) 376 HughesvilleMDPeerless Network of Maryland
(240) 377 Indian HeadMDGlobal Crossing Local Services - MD
(240) 378 CumberlandMDCore Communications
(240) 379 FrederickMDVerizon Maryland
(240) 380 Cabin JohnMDCellco Partnership DBA Verizon
(240) 381 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 382 HagerstownMDTeleport Communications America
(240) 383 Chevy ChaseMDNew Cingular Wireless PCS, LLC
(240) 384 CallawayMDPeerless Network of Maryland
(240) 385 MyersvilleMDVerizon Maryland
(240) 386 GaithersburgMDVerizon Maryland
(240) 387 Chevy ChaseMDCavalier East LLC
(240) 388 GaithersburgMDSprint Spectrum L.P.
(240) 389 Sandy SpringMDAtx Telecommunications Services, LTD
(240) 390 Sandy SpringMDCavalier Telephone Mid-Atlantic
(240) 391 Mount RainierMDGlobal Crossing Local Services - MD
(240) 392 Oxon HillMDStarpower Communications
(240) 393 Cabin JohnMDCellco Partnership DBA Verizon
(240) 394 Mount AiryMDNew Cingular Wireless PCS, LLC
(240) 395 BethesdaMDCavalier Telephone Mid-Atlantic
(240) 396 Mount RainierMDGlobal Crossing Local Services - MD
(240) 397 FrederickMDCellco Partnership DBA Verizon
(240) 398 Cabin JohnMDSprint Spectrum L.P.
(240) 399 Chevy ChaseMDXO Communications Maryland
(240) 400 BethesdaMDSprint Spectrum L.P.
(240) 401 RockvilleMDNew Cingular Wireless PCS, LLC
(240) 402 College ParkMDMCI Worldcom Communications
(240) 403 RockvilleMDCavalier Telephone Mid-Atlantic
(240) 404 GaithersburgMDXO Communications Maryland
(240) 405 FrederickMDUS LEC of Maryland
(240) 406 RockvilleMDLeap Wireless Intl DBA Cricket Comm
(240) 407 Mount RainierMDGlobal Crossing Local Services - MD
(240) 408 RockvilleMDLeap Wireless Intl DBA Cricket Comm
(240) 409 FrederickMDNew Cingular Wireless PCS, LLC
(240) 412 WaldorfMDSprint Spectrum L.P.
(240) 413 HyattsvilleMDOmnipoint Communications Cap Operations
(240) 414 Mount RainierMDPeerless Network of Maryland
(240) 415 FrederickMDYMAX Communications Corp.
(240) 416 WaldorfMDNew Cingular Wireless PCS, LLC
(240) 417 Capitol HeightsMDSprint Spectrum L.P.
(240) 418 BeltsvilleMDSprint Spectrum L.P.
(240) 419 WaldorfMDCellco Partnership DBA Verizon
(240) 420 HagerstownMDVerizon Maryland
(240) 421 RockvilleMDOmnipoint Communications Cap Operations
(240) 422 FrederickMDOmnipoint Communications Cap Operations
(240) 423 Silver SpringMDOmnipoint Communications Cap Operations
(240) 424 Mount RainierMDSprint Spectrum L.P.
(240) 425 Cabin JohnMDDslnet Communications VA
(240) 426 BethesdaMDSprint Spectrum L.P.
(240) 427 WaldorfMDXO Communications Maryland
(240) 428 RockvilleMDBandwidth.com - CLEC
(240) 429 Silver SpringMDCellco Partnership DBA Verizon
(240) 430 KensingtonMDCavalier Telephone Mid-Atlantic
(240) 431 Tall TimbersMDSprint Spectrum L.P.
(240) 432 BeltsvilleMDSprint Spectrum L.P.
(240) 433 Silver SpringMDCavalier Telephone Mid-Atlantic
(240) 434 LeonardtownMDBroadwing Communications. LLC
(240) 435 WaldorfMDCellco Partnership DBA Verizon
(240) 436 IjamsvilleMDTelcove Operations
(240) 437 Sandy SpringMDXO Communications Maryland
(240) 438 Silver SpringMDSprint Spectrum L.P.
(240) 439 FrederickMDCellco Partnership DBA Verizon
(240) 440 FrederickMDLeap Wireless Intl DBA Cricket Comm
(240) 441 Oxon HillMDOmnipoint Communications Cap Operations
(240) 442 OaklandMDVerizon Maryland
(240) 444 LaurelMDCellco Partnership DBA Verizon
(240) 445 BethesdaMDSprint Spectrum L.P.
(240) 446 FrederickMDCellco Partnership DBA Verizon
(240) 447 RockvilleMDNew Cingular Wireless PCS, LLC
(240) 448 WaldorfMDSprint Spectrum L.P.
(240) 449 GaithersburgMDNew Cingular Wireless PCS, LLC
(240) 450 Silver SpringMDCavalier Telephone Mid-Atlantic
(240) 452 HagerstownMDLumos Networks Inc. - VA
(240) 453 RockvilleMDVerizon Maryland
(240) 454 GaithersburgMDPaetec Communications
(240) 455 Oxon HillMDPaetec Communications
(240) 456 LaurelMDVerizon Maryland
(240) 457 FrederickMDCellco Partnership DBA Verizon
(240) 458 WaldorfMDCellco Partnership DBA Verizon
(240) 459 LaurelMDCellco Partnership DBA Verizon
(240) 460 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 461 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 462 BeltsvilleMDSprint Spectrum L.P.
(240) 463 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 464 Chevy ChaseMDSprint Spectrum L.P.
(240) 465 Mount RainierMDPeerless Network of Maryland
(240) 466 MechanicsvilleMDNew Cingular Wireless PCS, LLC
(240) 467 Oxon HillMDComcast Phone of Northern Maryland
(240) 468 Mount RainierMDSprint Spectrum L.P.
(240) 469 HagerstownMDSprint Spectrum L.P.
(240) 470 LaurelMDCellco Partnership DBA Verizon
(240) 471 Silver SpringMDGlobal Crossing Local Services - MD
(240) 472 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 473 College ParkMDCavalier Telephone Mid-Atlantic
(240) 475 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 476 Silver SpringMDOmnipoint Communications Cap Operations
(240) 477 GaithersburgMDLightwave Communications
(240) 478 Cabin JohnMDNew Cingular Wireless PCS, LLC
(240) 479 Oxon HillMDCellco Partnership DBA Verizon
(240) 480 BethesdaMDSprint Spectrum L.P.
(240) 481 Silver SpringMDOmnipoint Communications Cap Operations
(240) 482 Cabin JohnMDUS LEC of Maryland
(240) 483 Oxon HillMDComcast Phone of Northern Maryland
(240) 485 Cabin JohnMDUS LEC of Maryland
(240) 486 Glenn DaleMDOmnipoint Communications Cap Operations
(240) 487 HyattsvilleMDUS LEC of Maryland
(240) 488 OaklandMDShentel Communications
(240) 489 PoolesvilleMDXO Communications Maryland
(240) 490 MiddletownMDOmnipoint Communications Cap Operations
(240) 491 Mount RainierMDGlobal Crossing Local Services - MD
(240) 492 Capitol HeightsMDUS LEC of Maryland
(240) 493 Oxon HillMDUS LEC of Maryland
(240) 494 Mount RainierMDCavalier East LLC
(240) 495 Mount RainierMDCellco Partnership DBA Verizon
(240) 497 Chevy ChaseMDVerizon Maryland
(240) 498 BeltsvilleMDSprint Spectrum L.P.
(240) 499 Cabin JohnMDUS LEC of Maryland
(240) 500 HagerstownMDUS LEC of Maryland
(240) 501 Silver SpringMDSprint Spectrum L.P.
(240) 502 Silver SpringMDSprint Spectrum L.P.
(240) 503 NewburgMDPeerless Network of Maryland
(240) 504 Silver SpringMDSprint Spectrum L.P.
(240) 505 Silver SpringMDOmnipoint Communications Cap Operations
(240) 506 RockvilleMDNew Cingular Wireless PCS, LLC
(240) 507 Cabin JohnMDCellco Partnership DBA Verizon
(240) 508 Capitol HeightsMDSprint Spectrum L.P.
(240) 509 CroftonMDBandwidth.com - CLEC
(240) 510 Upper MarlboroMDXO Communications Maryland
(240) 512 College ParkMDCore Communications
(240) 513 HagerstownMDSprint Spectrum L.P.
(240) 514 Cabin JohnMDUS LEC of Maryland
(240) 515 BethesdaMDNew Cingular Wireless PCS, LLC
(240) 516 Silver SpringMDUS LEC of Maryland
(240) 518 WaldorfMDSprint Spectrum L.P.
(240) 519 BethesdaMDSprint Spectrum L.P.
(240) 520 HagerstownMDSprint Spectrum L.P.
(240) 522 CumberlandMDSprint Spectrum L.P.
(240) 523 La PlataMDXO Communications Maryland
(240) 524 LaurelMDPeerless Network of Maryland
(240) 525 Upper MarlboroMDPeerless Network of Maryland
(240) 526 LeonardtownMDPeerless Network of Maryland
(240) 527 HagerstownMDVerizon Maryland
(240) 528 HughesvilleMDBroadwing Communications. LLC
(240) 529 FrederickMDVerizon Maryland
(240) 530 WaldorfMDLocal Access LLC
(240) 532 Oxon HillMDCellco Partnership DBA Verizon
(240) 533 Mount RainierMDTeleport Communications America - DC
(240) 535 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 536 Sandy SpringMDPeerless Network of Maryland
(240) 538 LeonardtownMDXO Communications Maryland
(240) 539 Mount RainierMDPeerless Network of Maryland
(240) 541 BethesdaMDSprint Spectrum L.P.
(240) 542 College ParkMDUS LEC of Maryland
(240) 543 BethesdaMDSprint Spectrum L.P.
(240) 544 Glenn DaleMDUS LEC of Maryland
(240) 545 Upper MarlboroMDUS LEC of Maryland
(240) 546 ClintonMDUS LEC of Maryland
(240) 547 LaurelMDLevel 3 Communications
(240) 548 Mount RainierMDAllegiance Telecom
(240) 550 RockvilleMDLeap Wireless Intl DBA Cricket Comm
(240) 551 RockvilleMDLeap Wireless Intl DBA Cricket Comm
(240) 552 RockvilleMDLeap Wireless Intl DBA Cricket Comm
(240) 553 Mount RainierMDAllegiance Telecom
(240) 554 LaurelMDAllegiance Telecom
(240) 556 Glenn DaleMDPaetec Communications
(240) 558 KensingtonMDCavalier Telephone Mid-Atlantic
(240) 559 Sandy SpringMDAllegiance Telecom
(240) 560 Chevy ChaseMDXO Communications Maryland
(240) 561 LeonardtownMDCellco Partnership DBA Verizon
(240) 565 LaurelMDOmnipoint Communications Cap Operations
(240) 566 FrederickMDVerizon Maryland
(240) 567 RockvilleMDVerizon Maryland
(240) 568 LaurelMDVerizon Maryland
(240) 573 Upper MarlboroMDGlobal Crossing Local Services - MD
(240) 575 FrederickMDLevel 3 Communications
(240) 577 LeonardtownMDCellco Partnership DBA Verizon
(240) 578 FrederickMDCellco Partnership DBA Verizon
(240) 580 CumberlandMDSprint Spectrum L.P.
(240) 581 LaurelMDPaetec Communications - DC
(240) 582 HyattsvilleMDVerizon Maryland
(240) 583 BeltsvilleMDVerizon Maryland
(240) 585 WaldorfMDCellco Partnership DBA Verizon
(240) 586 FrederickMDVerizon Maryland
(240) 587 LeonardtownMDCellco Partnership DBA Verizon
(240) 593 LaurelMDOmnipoint Communications Cap Operations
(240) 595 Chevy ChaseMDCellco Partnership DBA Verizon
(240) 597 GaithersburgMDPeerless Network of Maryland
(240) 599 RockvilleMDBroadwing Communications. LLC
(240) 600 Mount RainierMDSprint Spectrum L.P.
(240) 601 BeltsvilleMDSprint Spectrum L.P.
(240) 602 BeltsvilleMDSprint Spectrum L.P.
(240) 603 BeltsvilleMDSprint Spectrum L.P.
(240) 604 BeltsvilleMDSprint Spectrum L.P.
(240) 605 BeltsvilleMDSprint Spectrum L.P.
(240) 606 BeltsvilleMDSprint Spectrum L.P.
(240) 607 WaldorfMDGlobal Crossing Local Services - MD
(240) 608 FrederickMD365
(240) 612 Mount RainierMDTW Telecom of Maryland LLC
(240) 613 HyattsvilleMDUS LEC of Maryland
(240) 614 RockvilleMDMetro PCS
(240) 615 HyattsvilleMDMetro PCS
(240) 616 College ParkMDMCI Worldcom Communications
(240) 619 Chevy ChaseMDMCI Worldcom Communications
(240) 620 RockvilleMDMCI Worldcom Communications
(240) 621 KensingtonMDMCI Worldcom Communications
(240) 624 GreenbeltMDVerizon Maryland
(240) 625 HagerstownMDSprint Spectrum L.P.
(240) 626 FrederickMDSprint Spectrum L.P.
(240) 627 Mount RainierMDGlobal Crossing Local Services - MD
(240) 629 FrederickMDVerizon Maryland
(240) 630 Mount RainierMDBandwidth.com - CLEC
(240) 631 GaithersburgMDVerizon Maryland
(240) 632 GaithersburgMDVerizon Maryland
(240) 638 Mount RainierMDBroadwing Communications. LLC
(240) 640 WaldorfMDLeap Wireless Intl DBA Cricket Comm
(240) 643 Silver SpringMDOmnipoint Communications Cap Operations
(240) 644 Chevy ChaseMDXO Communications Maryland
(240) 645 Chevy ChaseMDXO Communications Maryland
(240) 646 LaurelMDCavalier East LLC
(240) 650 Cabin JohnMDBroadvox - CLEC - DC
(240) 651 FrederickMDHalo Wireless Services
(240) 652 MechanicsvilleMDXO Communications Maryland
(240) 654 GaithersburgMDNew Cingular Wireless PCS, LLC
(240) 662 Silver SpringMDVerizon Maryland
(240) 667 Mount RainierMDGlobal Crossing Local Services - MD
(240) 668 DamascusMDStarpower Communications
(240) 669 KensingtonMDComcast Phone of Northern Maryland
(240) 670 Mount RainierMDLocal Access LLC
(240) 671 Mount RainierMDSprint Spectrum L.P.
(240) 672 RockvilleMDCellco Partnership DBA Verizon
(240) 674 FrederickMDSprint Spectrum L.P.
(240) 675 MyersvilleMDNew Cingular Wireless PCS, LLC
(240) 676 Silver SpringMDCellco Partnership DBA Verizon
(240) 678 Silver SpringMDCellco Partnership DBA Verizon
(240) 682 WaldorfMDStarpower Communications
(240) 683 GaithersburgMDVerizon Maryland
(240) 684 GreenbeltMDVerizon Maryland
(240) 685 BrandywineMDGlobal Crossing Local Services - MD
(240) 686 GaithersburgMDVerizon Maryland
(240) 687 Silver SpringMDCellco Partnership DBA Verizon
(240) 688 Silver SpringMDCellco Partnership DBA Verizon
(240) 691 Mount RainierMDGlobal Crossing Local Services - MD
(240) 694 RockvilleMDVerizon Maryland
(240) 695 Temple HillsMDVerizon Maryland
(240) 696 HyattsvilleMDLevel 3 Communications
(240) 699 AdamstownMDVerizon Maryland
(240) 701 Silver SpringMDLeap Wireless Intl DBA Cricket Comm
(240) 704 Mount RainierMDLeap Wireless Intl DBA Cricket Comm
(240) 705 Chevy ChaseMDLeap Wireless Intl DBA Cricket Comm
(240) 706 Chevy ChaseMDLeap Wireless Intl DBA Cricket Comm
(240) 707 HagerstownMDNew Cingular Wireless PCS, LLC
(240) 708 ColumbiaMDLevel 3 Communications
(240) 712 ColumbiaMDCellco Partnership DBA Verizon
(240) 713 LaurelMDPeerless Network of Maryland
(240) 715 RockvilleMDGlobal Crossing Local Services - MD
(240) 716 Mount RainierMDOmnipoint Communications Cap Operations
(240) 718 CallawayMDXO Communications Maryland
(240) 720 GaithersburgMDGlobal Crossing Local Services - MD
(240) 722 Sandy SpringMDGlobal Crossing Local Services - MD
(240) 723 Silver SpringMDCellco Partnership DBA Verizon
(240) 724 Mount RainierMDCavalier East LLC
(240) 725 Lexington ParkMDVerizon Maryland
(240) 727 CumberlandMDNew Cingular Wireless PCS, LLC
(240) 731 RockvilleMDNew Cingular Wireless PCS, LLC
(240) 734 HagerstownMDBandwidth.com - CLEC
(240) 737 Mount RainierMDCavalier East LLC
(240) 743 Oxon HillMDLocal Access LLC
(240) 744 Mount RainierMDBroadwing Communications. LLC
(240) 745 DamascusMDXO Communications Maryland
(240) 747 Mount RainierMDCavalier East LLC
(240) 750 GaithersburgMDNew Cingular Wireless PCS, LLC
(240) 751 GaithersburgMDTelcove Operations
(240) 752 BethesdaMDTelcove Operations
(240) 753 RockvilleMDTelcove Operations
(240) 754 WaldorfMDLevel 3 Communications
(240) 755 LaurelMDComcast Phone of Northern Maryland
(240) 757 Mount RainierMDPeerless Network of Maryland
(240) 762 Mount RainierMDCellco Partnership DBA Verizon
(240) 764 Chevy ChaseMDXO Communications Maryland
(240) 765 Chevy ChaseMDXO Communications Maryland
(240) 766 Chevy ChaseMDXO Communications Maryland
(240) 767 Capitol HeightsMDCavalier East LLC
(240) 770 Oxon HillMDComcast Phone of Northern Maryland
(240) 772 FrederickMDCellco Partnership DBA Verizon
(240) 773 RockvilleMDVerizon Maryland
(240) 776 La PlataMDBroadwing Communications. LLC
(240) 777 RockvilleMDVerizon Maryland
(240) 778 Chevy ChaseMDXO Communications Maryland
(240) 779 Sandy SpringMDCavalier East LLC
(240) 780 GaithersburgMDBroadwing Communications. LLC
(240) 782 DamascusMDGlobal Crossing Local Services - MD
(240) 783 BethesdaMDMte DBA Mte Paging Network
(240) 784 MyersvilleMDOmnipoint Communications Cap Operations
(240) 786 LaurelMDBroadwing Communications. LLC
(240) 787 BrandywineMDBroadwing Communications. LLC
(240) 788 Oxon HillMDBroadwing Communications. LLC
(240) 790 Mount RainierMDBroadwing Communications. LLC
(240) 793 GaithersburgMDSprint Spectrum L.P.
(240) 794 CallawayMDBroadwing Communications. LLC
(240) 800 Chevy ChaseMDCore Communications
(240) 801 GaithersburgMDCellco Partnership DBA Verizon
(240) 802 BethesdaMD365
(240) 803 CumberlandMDNew Cingular Wireless PCS, LLC
(240) 804 NewburgMDXO Communications Maryland
(240) 812 PoolesvilleMDGlobal Crossing Local Services - MD
(240) 813 GaithersburgMDAtx Telecommunications Services, LTD
(240) 818 SmithsburgMDVerizon Maryland
(240) 821 Silver SpringMDLightwave Communications
(240) 823 BrandywineMDXO Communications Maryland
(240) 826 RockvilleMDVerizon Maryland
(240) 832 BethesdaMDSprint Spectrum L.P.
(240) 833 Chevy ChaseMDXO Communications Maryland
(240) 837 HughesvilleMDXO Communications Maryland
(240) 838 Oxon HillMDOmnipoint Communications Cap Operations
(240) 839 Silver SpringMDCellco Partnership DBA Verizon
(240) 841 LaurelMDAllegiance Telecom
(240) 842 Glenn DaleMDAllegiance Telecom
(240) 843 College ParkMDAllegiance Telecom
(240) 844 RidgeMDXO Communications Maryland
(240) 845 Chevy ChaseMDXO Communications Maryland
(240) 846 ClintonMDXO Communications Maryland
(240) 848 GaithersburgMDSprint Spectrum L.P.
(240) 855 Cabin JohnMDSprint Spectrum L.P.
(240) 857 Mount RainierMDTW Telecom of Maryland LLC
(240) 863 LaurelMDTW Telecom of Maryland LLC
(240) 864 RockvilleMDCavalier East LLC
(240) 865 BaltimoreMDLevel 3 Communications
(240) 868 Mount RainierMDCavalier East LLC
(240) 876 BethesdaMDSprint Spectrum L.P.
(240) 880 Chevy ChaseMDBroadwing Communications. LLC
(240) 882 Capitol HeightsMDSprint Spectrum L.P.
(240) 883 Sandy SpringMDBroadwing Communications. LLC
(240) 888 RockvilleMDNew Cingular Wireless PCS, LLC
(240) 892 Upper MarlboroMDBroadwing Communications. LLC
(240) 893 Silver SpringMDNew Cingular Wireless PCS, LLC
(240) 895 Lexington ParkMDVerizon Maryland
(240) 897 Mount RainierMDBroadwing Communications. LLC
(240) 898 Mount RainierMDBroadwing Communications. LLC
(240) 899 BethesdaMDOmnipoint Communications Cap Operations
(240) 903 Indian HeadMDComcast Phone of Northern Maryland
(240) 912 GaithersburgMDUS LEC of Maryland
(240) 920 CumberlandMDLevel 3 Communications
(240) 925 LeonardtownMDCellco Partnership DBA Verizon
(240) 929 Mount RainierMDCavalier East LLC
(240) 938 AshtonMDOmnipoint Communications Cap Operations
(240) 949 Mount RainierMDCavalier East LLC
(240) 964 CumberlandMDVerizon Maryland
(240) 965 College ParkMDPaetec Communications
(240) 979 CumberlandMDLevel 3 Communications
(240) 986 NanjemoyMDXO Communications Maryland
(240) 988 BeltsvilleMDSprint Spectrum L.P.
(240) 993 Indian HeadMDXO Communications Maryland
(240) 994 RockvilleMDCellco Partnership DBA Verizon
(240) 997 Silver SpringMDCellco Partnership DBA Verizon