Area Code 240

240 is the area code for western Maryland including its Washington DC suburbs. It was created as an overlay to area code 301 in 1997.
Area Code : 240
State : Maryland
Timezoon : Eastern
Major City : Gaithersburg
 
Main Cities on 240
Aspen Hill, MD ; Bethesda, MD ; Bowie, MD ; Chillum, MD ; Clinton, MD ; College Park, MD ; Cumberland, MD ; Fairland, MD ; Fort Washington, MD ; Frederick, MD ; Gaithersburg, MD ; Germantown, MD ; Greenbelt, MD ; Hagerstown, MD ; Landover, MD ; Montgomery Village, MD ; North Bethesda, MD ; North Laurel, MD ; North Potomac, MD ; Olney, MD ; Oxon Hill-glassmanor, MD ; Potomac, MD ; Rockville, MD ; Silver Spring, MD ; South Laurel, MD ; St. Charles, MD ; Suitland, MD ; Waldorf, MD ; Wheaton-glenmont, MD ; White Oak, MD
 

Area Code Directory :

    (240) 0xx-xxxx
 
PrefixLinksPrimary CityService ProviderLine Type
200(240) 200- Mount Rainier, MDBandwidth.com ClecUnknown
201(240) 201- Ridge, MDGlobal Naps SouthLandline
205(240) 205- Rockville, MDNew Cingular Wireless PCS - DCCell Number
206(240) 206- Glenn Dale, MDXo MarylandLandline
207(240) 207- Damascus, MDCavalier East LLCLandline
208(240) 208- La Plata, MDGlobal Naps SouthLandline
209(240) 209- Indian Head, MDGlobal Naps SouthLandline
210(240) 210- Waldorf, MDNew Cingular Wireless PCS - DCCell Number
212(240) 212- Oakland, MDCore CommunicationsLandline
213(240) 213- Waldorf, MDGlobal Naps SouthLandline
214(240) 214- Mechanicsville, MDGlobal Naps SouthLandline
215(240) 215- Frederick, MDTelcove OperationsLandline
216(240) 216- Waldorf, MDNextel CommunicationsCell Number
217(240) 217- Hagerstown, MDOmnipoint Communications Cap OperationsCell Number
218(240) 218- Nanjemoy, MDGlobal Naps SouthLandline
219(240) 219- Newburg, MDGlobal Naps SouthLandline
220(240) 220- Poolesville, MDGlobal Naps SouthLandline
221(240) 221- Rockville, MDVerizon MarylandLandline
222(240) 222- Waldorf, MDCavalier Telephone Mid-atlanticLandline
223(240) 223- Mount Rainier, MDAllegiance TelecomLandline
224(240) 224- Cell Number
225(240) 225- Frederick, MDCore CommunicationsLandline
228(240) 228- Laurel, MDVerizon MarylandLandline
229(240) 229- Waldorf, MDBroadwing Communications. LLCLandline
230(240) 230- Hughesville, MDGlobal Crossing Local Services-mdLandline
231(240) 231- Hagerstown, MDCore CommunicationsLandline
232(240) 232- Mount Rainier, MDBroadwing Communications. LLCLandline
233(240) 233- Newburg, MDTeleport Communications Group - DCLandline
234(240) 234- Cell Number
235(240) 235- Bethesda, MDPaetec CommunicationsLandline
236(240) 236- Frederick, MDVerizon MarylandLandline
237(240) 237- Callaway, MDTeleport Communications Group - DCLandline
238(240) 238- Rockville, MDPaetec CommunicationsLandline
239(240) 239- Leonardtown, MDCore CommunicationsLandline
241(240) 241- Chevy Chase, MDStarpower CommunicationsLandline
242(240) 242- Kensington, MDStarpower CommunicationsLandline
243(240) 243- Gaithersburg, MDAllegiance TelecomLandline
244(240) 244- Mount Rainier, MDStarpower CommunicationsLandline
245(240) 245- Glenn Dale, MDStarpower CommunicationsLandline
246(240) 246- Gaithersburg, MDStarpower CommunicationsLandline
247(240) 247- Mount Rainier, MDAllegiance TelecomLandline
248(240) 248- Ridge, MDGlobal Naps SouthLandline
249(240) 249- Mechanicsville, MDTeleport Communications Group - DCLandline
250(240) 250- Brandywine, MDGlobal Naps SouthLandline
251(240) 251- Highfield, MDCore CommunicationsLandline
252(240) 252- Gaithersburg, MDLevel 3 CommunicationsLandline
253(240) 253- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
254(240) 254- Hughesville, MDTeleport Communications Group - DCLandline
255(240) 255- Poolesville, MDGlobal Naps SouthLandline
256(240) 256- Leonardtown, MDTeleport Communications Group - DCLandline
257(240) 257- Nanjemoy, MDTeleport Communications Group - DCLandline
258(240) 258- Ridge, MDTeleport Communications Group - DCLandline
260(240) 260- Mount Rainier, MDAllegiance TelecomLandline
261(240) 261- Rockville, MDGlobal Naps SouthLandline
262(240) 262- Damascus, MDTidalwave Telephone Inc.Landline
263(240) 263- Damascus, MDTidalwave Telephone Inc.Landline
264(240) 264- Beltsville, MDVerizon MarylandLandline
265(240) 265- Capitol Heights, MDTidalwave Telephone Inc.Landline
266(240) 266- Glenn Dale, MDGlobal Naps SouthLandline
267(240) 267- Capitol Heights, MDTidalwave Telephone Inc.Landline
268(240) 268- Rockville, MDAllegiance TelecomLandline
269(240) 269- Clinton, MDGlobal Naps SouthLandline
270(240) 270- Glenn Dale, MDTidalwave Telephone Inc.Landline
271(240) 271- Bethesda, MDNew Cingular Wireless PCS - DCCell Number
272(240) 272- Glenn Dale, MDTidalwave Telephone Inc.Landline
273(240) 273- Mount Rainier, MDBroadwing Communications. LLCLandline
274(240) 274- Bethesda, MDNew Cingular Wireless PCS - DCCell Number
275(240) 275- Grantsville, MDCore CommunicationsLandline
276(240) 276- Rockville, MDVerizon MarylandLandline
277(240) 277- Bethesda, MDSprint Spectrum L.p.Cell Number
278(240) 278- Cellco Partnership DBA Verizon WirelessUnknown
279(240) 279- Waldorf, MDCore CommunicationsLandline
280(240) 280- Laurel, MDComcast Phone Of Northern MarylandLandline
281(240) 281- Bethesda, MDNew Cingular Wireless PCS - DCCell Number
282(240) 282- Mechanicsville, MDGlobal Naps SouthLandline
283(240) 283- Kensington, MDPaetec CommunicationsLandline
284(240) 284- Frostburg, MDNationslineLandline
285(240) 285- Frederick, MDCellco Partnership DBA Verizon WirelessLandline
286(240) 286- Bethesda, MDNextel CommunicationsCell Number
287(240) 287- Hancock, MDCore CommunicationsLandline
288(240) 288- Thurmont, MDNationslineLandline
289(240) 289- Oxon Hill, MDCavalier Telephone Mid-atlanticLandline
290(240) 290- Mount Rainier, MDAllegiance TelecomLandline
291(240) 291- Hagerstown, MDNew Cingular Wireless PCS - DCCell Number
292(240) 292- Kensington, MDVerizon MarylandLandline
293(240) 293- Silver Spring, MDStarpower CommunicationsLandline
294(240) 294- Laurel, MDXo MarylandLandline
295(240) 295- Laurel, MDCavalier Telephone Mid-atlanticLandline
296(240) 296- Hyattsville, MDCavalier Telephone Mid-atlanticLandline
297(240) 297- College Park, MDLevel 3 CommunicationsLandline
298(240) 298- Leonardtown, MDCellco Partnership DBA Verizon WirelessCell Number
299(240) 299- Waldorf, MDNextel CommunicationsCell Number
300(240) 300- Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown
303(240) 303- Clinton, MDCavalier Telephone Mid-atlanticLandline
304(240) 304- Mount Rainier, MDNextel CommunicationsCell Number
553(240) 553- Mount Rainier, MDAllegiance TelecomLandline
554(240) 554- Laurel, MDAllegiance TelecomLandline
556(240) 556- Glenn Dale, MDPaetec CommunicationsLandline
558(240) 558- Kensington, MDCavalier Telephone Mid-atlanticLandline
559(240) 559- Sandy Spring, MDAllegiance TelecomLandline
560(240) 560- Chevy Chase, MDXo MarylandLandline
561(240) 561- Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown
552(240) 552- Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown
551(240) 551- Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown
550(240) 550- Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown
548(240) 548- Mount Rainier, MDAllegiance TelecomLandline
547(240) 547- Russett, MDLevel 3 CommunicationsLandline
546(240) 546- Clinton, MDUs Lec Of MarylandLandline
545(240) 545- Upper Marlboro, MDUs Lec Of MarylandLandline
544(240) 544- Glenn Dale, MDUs Lec Of MarylandLandline
543(240) 543- Bethesda, MDSprint Spectrum L.p.Unknown
542(240) 542- College Park, MDUs Lec Of MarylandLandline
540(240) 540- Unknown
539(240) 539- Hyattsville, MDGlobal Naps SouthLandline
538(240) 538- Leonardtown, MDXo MarylandLandline
536(240) 536- Sandy Spring, MDGlobal Naps SouthLandline
535(240) 535- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
533(240) 533- Mount Rainier, MDTeleport Communications Group - DCLandline
529(240) 529- Frederick, MDVerizon MarylandLandline
528(240) 528- Hughesville, MDBroadwing Communications. LLCLandline
527(240) 527- Hagerstown, MDVerizon MarylandLandline
526(240) 526- Leonardtown, MDGlobal Naps SouthLandline
525(240) 525- Upper Marlboro, MDGlobal Naps SouthLandline
524(240) 524- Russett, MDGlobal Naps SouthLandline
523(240) 523- La Plata, MDXo MarylandLandline
522(240) 522- Cumberland, MDSprint Spectrum L.p.Cell Number
520(240) 520- Hagerstown, MDSprint Spectrum L.p.Unknown
516(240) 516- Silver Spring, MDUs Lec Of MarylandLandline
515(240) 515- Bethesda, MDNew Cingular Wireless PCS - DCCell Number
514(240) 514- Cabin John, MDUs Lec Of MarylandLandline
512(240) 512- College Park, MDCore CommunicationsUnknown
510(240) 510- Upper Marlboro, MDXo MarylandLandline
509(240) 509- Crofton, MDBandwidth.com ClecUnknown
508(240) 508- Capitol Heights, MDNextel CommunicationsCell Number
500(240) 500- Hagerstown, MDUs Lec Of MarylandUnknown
499(240) 499- Cabin John, MDUs Lec Of MarylandLandline
498(240) 498- Beltsville, MDSprint Spectrum L.p.Cell Number
497(240) 497- Chevy Chase, MDVerizon MarylandLandline
494(240) 494- Mount Rainier, MDCavalier East LLCLandline
493(240) 493- Oxon Hill, MDUs Lec Of MarylandLandline
482(240) 482- Bethesda, MDUs Lec Of MarylandLandline
481(240) 481- Silver Spring, MDOmnipoint Communications Cap OperationsCell Number
480(240) 480- Bethesda, MDSprint Spectrum L.p.Unknown
479(240) 479- Oxon Hill, MDCellco Partnership DBA Verizon WirelessUnknown
478(240) 478- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
477(240) 477- Gaithersburg, MDLightwave CommunicationsLandline
476(240) 476- Silver Spring, MDOmnipoint Communications Cap OperationsCell Number
475(240) 475- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
473(240) 473- College Park, MDCavalier Telephone Mid-atlanticLandline
472(240) 472- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
471(240) 471- Silver Spring, MDGlobal Crossing Local Services-mdLandline
469(240) 469- Hagerstown, MDSprint Spectrum L.p.Unknown
468(240) 468- Mount Rainier, MDSprint Spectrum L.p.Unknown
466(240) 466- Mechanicsville, MDGlobal Naps SouthLandline
465(240) 465- Bethesda, MDGlobal Naps SouthLandline
464(240) 464- Chevy Chase, MDNextel CommunicationsLandline
463(240) 463- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
462(240) 462- Beltsville, MDSprint Spectrum L.p.Cell Number
461(240) 461- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
460(240) 460- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
459(240) 459- Laurel, MDCellco Partnership DBA Verizon WirelessUnknown
457(240) 457- Frederick, MDCellco Partnership DBA Verizon WirelessUnknown
456(240) 456- Laurel, MDVerizon MarylandLandline
455(240) 455- Capitol Heights, MDPaetec CommunicationsLandline
454(240) 454- Gaithersburg, MDPaetec CommunicationsCell Number
447(240) 447- Rockville, MDNew Cingular Wireless PCS - DCCell Number
446(240) 446- Frederick, MDCellco Partnership DBA Verizon WirelessCell Number
442(240) 442- Oakland, MDVerizon MarylandLandline
441(240) 441- Oxon Hill, MDOmnipoint Communications Cap OperationsCell Number
440(240) 440- Frederick, MDLeap Wireless Intl DBA Cricket CommUnknown
431(240) 431- Tall Timbers, MDSprint Spectrum L.p.Cell Number
430(240) 430- Kensington, MDCavalier Telephone Mid-atlanticLandline
429(240) 429- Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown
428(240) 428- Rockville, MDBandwidth.com ClecUnknown
427(240) 427- Waldorf, MDXo MarylandLandline
426(240) 426- Bethesda, MDSprint Spectrum L.p.Cell Number
425(240) 425- Cabin John, MDDslnet Communications VaLandline
424(240) 424- Mount Rainier, MDSprint Spectrum L.p.Unknown
423(240) 423- Silver Spring, MDOmnipoint Communications Cap OperationsCell Number
422(240) 422- Frederick, MDOmnipoint Communications Cap OperationsCell Number
421(240) 421- Rockville, MDOmnipoint Communications Cap OperationsCell Number
420(240) 420- Hagerstown, MDVerizon MarylandLandline
419(240) 419- Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown
418(240) 418- Beltsville, MDSprint Spectrum L.p.Cell Number
417(240) 417- Capitol Heights, MDNextel CommunicationsCell Number
416(240) 416- Waldorf, MDNew Cingular Wireless PCS - DCCell Number
415(240) 415- Frederick, MDYmax Communications Corp.Unknown
414(240) 414- Oxon Hill, MDGlobal Naps SouthLandline
413(240) 413- Hyattsville, MDOmnipoint Communications Cap OperationsCell Number
412(240) 412- Waldorf, MDSprint Spectrum L.p.Cell Number
409(240) 409- Frederick, MDNew Cingular Wireless PCS - DCCell Number
408(240) 408- Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown
407(240) 407- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
402(240) 402- College Park, MDMci Worldcom CommunicationsUnknown
401(240) 401- Rockville, MDNew Cingular Wireless PCS - DCCell Number
751(240) 751- Gaithersburg, MDTelcove OperationsLandline
752(240) 752- Bethesda, MDTelcove OperationsLandline
753(240) 753- Rockville, MDTelcove OperationsLandline
755(240) 755- Laurel, MDComcast Phone Of Northern MarylandLandline
399(240) 399- Chevy Chase, MDXo MarylandLandline
398(240) 398- Silver Spring, MDNextel CommunicationsCell Number
392(240) 392- Capitol Heights, MDStarpower CommunicationsLandline
391(240) 391- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
390(240) 390- Sandy Spring, MDCavalier Telephone Mid-atlanticLandline
389(240) 389- Sandy Spring, MDAtx Telecommunications Services, LtdLandline
773(240) 773- Rockville, MDVerizon MarylandLandline
776(240) 776- La Plata, MDBroadwing Communications. LLCLandline
777(240) 777- Rockville, MDVerizon MarylandLandline
778(240) 778- Chevy Chase, MDXo MarylandLandline
779(240) 779- Sandy Spring, MDCavalier East LLCLandline
780(240) 780- Gaithersburg, MDBroadwing Communications. LLCLandline
388(240) 388- Gaithersburg, MDNextel CommunicationsCell Number
387(240) 387- Chevy Chase, MDCavalier East LLCLandline
386(240) 386- Gaithersburg, MDVerizon MarylandLandline
385(240) 385- Myersville, MDVerizon MarylandLandline
384(240) 384- Callaway, MDGlobal Naps SouthLandline
383(240) 383- Chevy Chase, MDNew Cingular Wireless PCS - DCCell Number
382(240) 382- Hagerstown, MDTeleport Communications Group AmericaUnknown
381(240) 381- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
380(240) 380- Cabin John, MDCellco Partnership DBA Verizon WirelessUnknown
379(240) 379- Frederick, MDVerizon MarylandLandline
378(240) 378- Cumberland, MDCore CommunicationsLandline
377(240) 377- Indian Head, MDGlobal Crossing Local Services-mdLandline
376(240) 376- Hughesville, MDGlobal Naps SouthLandline
375(240) 375- Capitol Heights, MDNextel CommunicationsCell Number
374(240) 374- Laurel, MDGlobal Crossing Local Services-mdLandline
373(240) 373- Odenton, MDVerizon MarylandLandline
372(240) 372- Gaithersburg, MDNextel CommunicationsCell Number
371(240) 371- Silver Spring, MDGlobal Naps SouthLandline
370(240) 370- Bethesda, MDSprint Spectrum L.p.Unknown
369(240) 369- Mount Airy, MDCore CommunicationsLandline
368(240) 368- Waldorf, MDGlobal Naps SouthLandline
367(240) 367- Frederick, MDNextel CommunicationsCell Number
366(240) 366- Williamsport, MDAT&T LocalLandline
365(240) 365- Damascus, MDBaltimore-washington Telephone BwtLandline
364(240) 364- Gaithersburg, MDCavalier East LLCLandline
363(240) 363- Kensington, MDGlobal Naps SouthLandline
362(240) 362- Cumberland, MDVerizon MarylandLandline
361(240) 361- Gaithersburg, MDCavalier Telephone Mid-atlanticLandline
359(240) 359- Indian Head, MDGlobal Naps SouthLandline
358(240) 358- Damascus, MDGlobal Naps SouthLandline
357(240) 357- Frederick, MDCellco Partnership DBA Verizon WirelessUnknown
356(240) 356- Frederick, MDLevel 3 CommunicationsLandline
355(240) 355- Beltsville, MDSprint Spectrum L.p.Cell Number
354(240) 354- Beltsville, MDSprint Spectrum L.p.Cell Number
353(240) 353- Beltsville, MDSprint Spectrum L.p.Cell Number
352(240) 352- La Plata, MDGlobal Naps SouthLandline
351(240) 351- Beltsville, MDSprint Spectrum L.p.Cell Number
350(240) 350- Beltsville, MDSprint Spectrum L.p.Cell Number
349(240) 349- La Plata, MDGlobal Crossing Local Services-mdLandline
337(240) 337- Capitol Heights, MDGlobal Naps SouthLandline
336(240) 336- Bethesda, MDCore CommunicationsLandline
335(240) 335- Glenn Dale, MDCavalier Telephone Mid-atlanticLandline
334(240) 334- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
333(240) 333- Mount Rainier, MDCavalier East LLCLandline
332(240) 332- Newburg, MDGlobal Naps SouthLandline
331(240) 331- Silver Spring, MDGlobal Naps SouthLandline
330(240) 330- Cabin John, MDSprint Spectrum L.p.Unknown
329(240) 329- Hagerstown, MDLevel 3 CommunicationsLandline
328(240) 328- Rockville, MDVerizon MarylandLandline
327(240) 327- Gaithersburg, MDCore CommunicationsLandline
326(240) 326- Upper Marlboro, MDCavalier Telephone Mid-atlanticLandline
325(240) 325- Damascus, MDCore CommunicationsLandline
324(240) 324- Clarksville, MDYmax Communications Corp.Unknown
323(240) 323- Emmitsburg, MDCore CommunicationsLandline
322(240) 322- Mccoole, MDCore CommunicationsLandline
321(240) 321- Oakland, MDUscoc Of Cumberland DBA United States Cel MdCell Number
320(240) 320- Waldorf, MDCavalier East LLCLandline
319(240) 319- Columbia, MDCellco Partnership DBA Verizon WirelessUnknown
318(240) 318- Clinton, MDVerizon MarylandLandline
317(240) 317- Callaway, MDStarpower CommunicationsLandline
316(240) 316- Chevy Chase, MDSprint Spectrum L.p.Unknown
315(240) 315- Frederick, MDVerizon MarylandLandline
314(240) 314- Rockville, MDVerizon MarylandLandline
313(240) 313- Hagerstown, MDVerizon MarylandLandline
312(240) 312- Capitol Heights, MDCavalier Telephone Mid-atlanticLandline
310(240) 310- Hagerstown, MDUscoc Of Cumberland DBA United States Cel MdCell Number
308(240) 308- Damascus, MDNew Cingular Wireless PCS - DCCell Number
307(240) 307- Emmitsburg, MDAT&T LocalLandline
306(240) 306- Gaithersburg, MDAllegiance TelecomLandline
305(240) 305- Beltsville, MDSprint Spectrum L.p.Cell Number
565(240) 565- Laurel, MDOmnipoint Communications Cap OperationsCell Number
566(240) 566- Frederick, MDVerizon MarylandLandline
567(240) 567- Rockville, MDVerizon MarylandUnknown
568(240) 568- Laurel, MDVerizon MarylandLandline
573(240) 573- Upper Marlboro, MDGlobal Crossing Local Services-mdLandline
575(240) 575- Frederick, MDLevel 3 CommunicationsLandline
577(240) 577- Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown
578(240) 578- Cellco Partnership DBA Verizon WirelessUnknown
580(240) 580- Cumberland, MDNextel CommunicationsCell Number
581(240) 581- Laurel, MDPaetec Communications - DCLandline
582(240) 582- Hyattsville, MDVerizon MarylandLandline
583(240) 583- Beltsville, MDVerizon MarylandUnknown
585(240) 585- Cellco Partnership DBA Verizon WirelessUnknown
586(240) 586- Frederick, MDVerizon MarylandUnknown
587(240) 587- Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown
593(240) 593- Laurel, MDOmnipoint Communications Cap OperationsCell Number
595(240) 595- Chevy Chase, MDCellco Partnership DBA Verizon WirelessUnknown
597(240) 597- Gaithersburg, MDGlobal Naps SouthLandline
599(240) 599- Rockville, MDBroadwing Communications. LLCLandline
600(240) 600- Bethesda, MDSprint Spectrum L.p.Unknown
601(240) 601- Beltsville, MDSprint Spectrum L.p.Cell Number
602(240) 602- Beltsville, MDSprint Spectrum L.p.Cell Number
603(240) 603- Beltsville, MDSprint Spectrum L.p.Cell Number
604(240) 604- Beltsville, MDSprint Spectrum L.p.Cell Number
605(240) 605- Beltsville, MDSprint Spectrum L.p.Cell Number
606(240) 606- Beltsville, MDSprint Spectrum L.p.Cell Number
607(240) 607- Waldorf, MDGlobal Crossing Local Services-mdLandline
612(240) 612- Mount Rainier, MDTw Telecom Of Maryland LLCUnknown
616(240) 616- College Park, MDMci Worldcom CommunicationsLandline
618(240) 618- Cellco Partnership DBA Verizon WirelessUnknown
619(240) 619- Chevy Chase, MDMci Worldcom CommunicationsLandline
620(240) 620- Rockville, MDMci Worldcom CommunicationsLandline
621(240) 621- Kensington, MDMci Worldcom CommunicationsLandline
507(240) 507- Cabin John, MDCellco Partnership DBA Verizon WirelessUnknown
506(240) 506- Rockville, MDNew Cingular Wireless PCS - DCCell Number
505(240) 505- Silver Spring, MDOmnipoint Communications Cap OperationsCell Number
501(240) 501- Silver Spring, MDSprint Spectrum L.p.Cell Number
624(240) 624- Greenbelt, MDVerizon MarylandLandline
625(240) 625- Hagerstown, MDNextel CommunicationsLandline
626(240) 626- Frederick, MDSprint Spectrum L.p.Cell Number
627(240) 627- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
629(240) 629- Frederick, MDVerizon MarylandLandline
631(240) 631- Gaithersburg, MDVerizon MarylandLandline
492(240) 492- Capitol Heights, MDUs Lec Of MarylandLandline
491(240) 491- Mount Rainier, MDGlobal Crossing Local Services-mdCell Number
490(240) 490- Middletown, MDOmnipoint Communications Cap OperationsCell Number
489(240) 489- Poolesville, MDXo MarylandLandline
487(240) 487- Hyattsville, MDUs Lec Of MarylandLandline
486(240) 486- Glenn Dale, MDOmnipoint Communications Cap OperationsCell Number
485(240) 485- Cabin John, MDUs Lec Of MarylandLandline
483(240) 483- Bethesda, MDComcast Phone Of Northern MarylandLandline
632(240) 632- Gaithersburg, MDVerizon MarylandLandline
638(240) 638- Mount Rainier, MDBroadwing Communications. LLCLandline
640(240) 640- Waldorf, MDLeap Wireless Intl DBA Cricket CommUnknown
641(240) 641- Rockville, MDTidalwave Telephone Inc.Landline
642(240) 642- Rockville, MDTidalwave Telephone Inc.Landline
643(240) 643- Silver Spring, MDOmnipoint Communications Cap OperationsCell Number
644(240) 644- Chevy Chase, MDXo MarylandLandline
645(240) 645- Chevy Chase, MDXo MarylandLandline
646(240) 646- Laurel, MDCavalier East LLCLandline
652(240) 652- Mechanicsville, MDXo MarylandLandline
654(240) 654- Gaithersburg, MDNew Cingular Wireless PCS - DCUnknown
662(240) 662- Silver Spring, MDVerizon MarylandLandline
667(240) 667- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
668(240) 668- Damascus, MDStarpower CommunicationsLandline
669(240) 669- Kensington, MDComcast Phone Of Northern MarylandLandline
671(240) 671- Mount Rainier, MDSprint Spectrum L.p.Landline
672(240) 672- Rockville, MDCellco Partnership DBA Verizon WirelessLandline
674(240) 674- Frederick, MDNextel CommunicationsCell Number
675(240) 675- Myersville, MDNew Cingular Wireless PCS - DCCell Number
676(240) 676- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number
678(240) 678- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number
681(240) 681- Brandywine, MDAtx Telecommunications Services, LtdLandline
682(240) 682- Waldorf, MDStarpower CommunicationsLandline
683(240) 683- Gaithersburg, MDVerizon MarylandLandline
684(240) 684- Greenbelt, MDVerizon MarylandLandline
453(240) 453- Rockville, MDVerizon MarylandLandline
452(240) 452- Hagerstown, MDNtelos Network Inc.-vaUnknown
450(240) 450- Silver Spring, MDCavalier Telephone Mid-atlanticLandline
449(240) 449- Gaithersburg, MDNew Cingular Wireless PCS - DCCell Number
685(240) 685- Brandywine, MDGlobal Crossing Local Services-mdLandline
686(240) 686- Gaithersburg, MDVerizon MarylandLandline
687(240) 687- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number
688(240) 688- Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown
691(240) 691- Mount Rainier, MDGlobal Crossing Local Services-mdLandline
439(240) 439- Frederick, MDCellco Partnership DBA Verizon WirelessUnknown
437(240) 437- Sandy Spring, MDXo MarylandLandline
436(240) 436- Ijamsville, MDTelcove OperationsLandline
435(240) 435- Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown
434(240) 434- Leonardtown, MDBroadwing Communications. LLCLandline
433(240) 433- Silver Spring, MDCavalier Telephone Mid-atlanticLandline
432(240) 432- Beltsville, MDSprint Spectrum L.p.Cell Number
694(240) 694- Rockville, MDVerizon MarylandLandline
695(240) 695- Temple Hills, MDVerizon MarylandLandline
696(240) 696- Hyattsville, MDLevel 3 CommunicationsLandline
699(240) 699- Adamstown, MDVerizon MarylandLandline
701(240) 701- Silver Spring, MDLeap Wireless Intl DBA Cricket CommUnknown
702(240) 702- Unknown
704(240) 704- Mount Rainier, MDLeap Wireless Intl DBA Cricket CommUnknown
705(240) 705- Chevy Chase, MDLeap Wireless Intl DBA Cricket CommUnknown
706(240) 706- Chevy Chase, MDLeap Wireless Intl DBA Cricket CommUnknown
715(240) 715- Rockville, MDGlobal Crossing Local Services-mdLandline
718(240) 718- Callaway, MDXo MarylandLandline
720(240) 720- Gaithersburg, MDGlobal Crossing Local Services-mdLandline
722(240) 722- Sandy Spring, MDGlobal Crossing Local Services-mdLandline
723(240) 723- Silver Spring, MDCellco Partnership DBA Verizon WirelessLandline
724(240) 724- Oxon Hill, MDCavalier East LLCLandline
725(240) 725- Lexington Park, MDVerizon MarylandLandline
727(240) 727- Cumberland, MDNew Cingular Wireless PCS - DCCell Number
731(240) 731- Rockville, MDNew Cingular Wireless PCS - DCCell Number
737(240) 737- Mount Rainier, MDCavalier East LLCLandline
743(240) 743- Oxon Hill, MDNew Cingular Wireless PCS - DCUnknown
744(240) 744- Mount Rainier, MDBroadwing Communications. LLCLandline
745(240) 745- Damascus, MDXo MarylandLandline
747(240) 747- Kensington, MDCavalier East LLCLandline
406(240) 406- Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown
405(240) 405- Frederick, MDUs Lec Of MarylandLandline
404(240) 404- Gaithersburg, MDXo MarylandLandline
403(240) 403- Rockville, MDCavalier Telephone Mid-atlanticLandline
750(240) 750- Gaithersburg, MDNew Cingular Wireless PCS - DCCell Number
757(240) 757- College Park, MDGlobal Naps SouthLandline
764(240) 764- Hyattsville, MDXo MarylandLandline
765(240) 765- Chevy Chase, MDXo MarylandLandline
397(240) 397- Frederick, MDCellco Partnership DBA Verizon WirelessUnknown
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395(240) 395- Bethesda, MDCavalier Telephone Mid-atlanticLandline
394(240) 394- Mount Airy, MDNew Cingular Wireless PCS - DCCell Number
393(240) 393- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number
766(240) 766- Chevy Chase, MDXo MarylandLandline
767(240) 767- Capitol Heights, MDCavalier East LLCLandline
770(240) 770- Oxon Hill, MDComcast Phone Of Northern MarylandLandline
782(240) 782- Damascus, MDGlobal Crossing Local Services-mdLandline
783(240) 783- Bethesda, MDMte DBA Mte Paging NetworkCell Number
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786(240) 786- Laurel, MDBroadwing Communications. LLCLandline
787(240) 787- Brandywine, MDBroadwing Communications. LLCLandline
788(240) 788- Mount Rainier, MDBroadwing Communications. LLCLandline
790(240) 790- Mount Rainier, MDBroadwing Communications. LLCLandline
793(240) 793- Gaithersburg, MDNextel CommunicationsCell Number
794(240) 794- Callaway, MDBroadwing Communications. LLCLandline
804(240) 804- Newburg, MDXo MarylandLandline
812(240) 812- Poolesville, MDGlobal Crossing Local Services-mdLandline
813(240) 813- Gaithersburg, MDAtx Telecommunications Services, LtdLandline
818(240) 818- Smithsburg, MDVerizon MarylandLandline
821(240) 821- Silver Spring, MDLightwave CommunicationsLandline
823(240) 823- Brandywine, MDXo MarylandLandline
825(240) 825- Unknown
826(240) 826- Rockville, MDVerizon MarylandUnknown
832(240) 832- Bethesda, MDNextel CommunicationsCell Number
833(240) 833- Chevy Chase, MDXo MarylandLandline
835(240) 835- Landline
837(240) 837- Hughesville, MDXo MarylandLandline
838(240) 838- Oxon Hill, MDOmnipoint Communications Cap OperationsCell Number
839(240) 839- Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown
841(240) 841- Laurel, MDAllegiance TelecomLandline
842(240) 842- Glenn Dale, MDAllegiance TelecomLandline
843(240) 843- College Park, MDAllegiance TelecomLandline
844(240) 844- Ridge, MDXo MarylandLandline
845(240) 845- Chevy Chase, MDXo MarylandLandline
846(240) 846- Clinton, MDXo MarylandLandline
848(240) 848- Gaithersburg, MDNextel CommunicationsLandline
855(240) 855- Bethesda, MDSprint Spectrum L.p.Unknown
857(240) 857- Mount Rainier, MDTw Telecom Of Maryland LLCLandline
863(240) 863- Laurel, MDTw Telecom Of Maryland LLCLandline
864(240) 864- Rockville, MDCavalier East LLCLandline
348(240) 348- Clinton, MDLevel 3 CommunicationsLandline
347(240) 347- Hagerstown, MDBandwidth.com ClecUnknown
346(240) 346- Waldorf, MDSprint Spectrum L.p.Cell Number
345(240) 345- Sandy Spring, MDLevel 3 CommunicationsUnknown
344(240) 344- Frederick, MDNew Cingular Wireless PCS - DCCell Number
343(240) 343- Cellco Partnership DBA Verizon WirelessUnknown
342(240) 342- Sandy Spring, MDStarpower CommunicationsLandline
341(240) 341- Adamstown, MDMci Worldcom CommunicationsUnknown
339(240) 339- Upper Marlboro, MDCavalier East LLCLandline
338(240) 338- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number
865(240) 865- Baltimore, MDLevel 3 CommunicationsLandline
868(240) 868- Mount Rainier, MDCavalier East LLCLandline
876(240) 876- Bethesda, MDNextel CommunicationsCell Number
880(240) 880- Mount Rainier, MDBroadwing Communications. LLCLandline
882(240) 882- Capitol Heights, MDNextel CommunicationsCell Number
883(240) 883- Sandy Spring, MDBroadwing Communications. LLCLandline
888(240) 888- Rockville, MDNew Cingular Wireless PCS - DCCell Number
892(240) 892- Upper Marlboro, MDBroadwing Communications. LLCLandline
893(240) 893- Silver Spring, MDNew Cingular Wireless PCS - DCCell Number
895(240) 895- Lexington Park, MDVerizon MarylandLandline
897(240) 897- Mount Rainier, MDBroadwing Communications. LLCLandline
898(240) 898- Mount Rainier, MDBroadwing Communications. LLCLandline
899(240) 899- Bethesda, MDOmnipoint Communications Cap OperationsCell Number
912(240) 912- Gaithersburg, MDUs Lec Of MarylandLandline
920(240) 920- Cumberland, MDLevel 3 CommunicationsLandline
925(240) 925- Leonardtown, MDCellco Partnership DBA Verizon WirelessCell Number
929(240) 929- Mount Rainier, MDCavalier East LLCLandline
938(240) 938- Ashton, MDOmnipoint Communications Cap OperationsCell Number
949(240) 949- Clinton, MDCavalier East LLCLandline
964(240) 964- Cumberland, MDVerizon MarylandUnknown
965(240) 965- College Park, MDPaetec CommunicationsLandline
976(240) 976- Baltimore-washington Telephone BwtUnknown
979(240) 979- Cumberland, MDLevel 3 CommunicationsLandline
986(240) 986- Nanjemoy, MDXo MarylandLandline
988(240) 988- Beltsville, MDSprint Spectrum L.p.Cell Number
993(240) 993- Indian Head, MDXo MarylandLandline
994(240) 994- Rockville, MDCellco Partnership DBA Verizon WirelessCell Number
997(240) 997- Silver Spring, MDCellco Partnership DBA Verizon WirelessCell Number