background
Cities in Areacode 240
  • Aspen Hill
  • North Bethesda
  • Bowie
  • Chillum
  • Clinton
  • College Park
  • Cumberland
  • Fairland
  • Fort Washington
  • Frederick
  • Gaithersburg
  • Germantown
  • Greenbelt
  • Hagerstown
  • Landover
  • Montgomery Village
  • North Bethesda
  • South Laurel
  • North Potomac
  • Olney
  • Potomac
  • Rockville
  • Silver Spring
  • South Laurel
  • Saint Charles
  • Suitland
  • Waldorf
  • White Oak
PREFIX USAGE PRIMARY CITY CARRIER
240-252- LandlineGaithersburg Level 3 Communications
240-264- LandlineBeltsville Verizon Maryland
240-481- WirelessSilver Spring Omnipoint Communications Cap Operations
240-275- LandlineGrantsville Core Communications
240-218- LandlineNanjemoy Peerless Network Of The District Of Columbia, Dc
240-495- WirelessMount Rainier Cellco Partnership DBA Verizon Wireless
240-346- WirelessWaldorf Sprint Spectrum L.p.
240-556- LandlineGlenn Dale Paetec Communications
240-567- LandlineRockville Verizon Maryland
240-545- LandlineUpper Marlboro Us Lec Of Maryland
240-387- LandlineChevy Chase Cavalier East LLC
240-553- LandlineMount Rainier Allegiance Telecom
240-583- LandlineBeltsville Verizon Maryland
240-786- LandlineLaurel Broadwing Communications. LLC
240-770- LandlineOxon Hill Comcast Phone Of Northern Maryland
240-605- WirelessBeltsville Sprint Spectrum L.p.
240-419- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-559- LandlineSandy Spring Allegiance Telecom
240-593- WirelessLaurel Omnipoint Communications Cap Operations
240-467- LandlineOxon Hill Comcast Phone Of Northern Maryland
240-454- WirelessGaithersburg Paetec Communications
240-667- LandlineMount Rainier Global Crossing Local Services-md
240-787- LandlineBrandywine Broadwing Communications. LLC
240-373- LandlineOdenton Verizon Maryland
240-292- LandlineKensington Verizon Maryland
240-994- WirelessRockville Cellco Partnership DBA Verizon Wireless
240-844- LandlineRidge Xo Maryland
240-459- WirelessLaurel Cellco Partnership DBA Verizon Wireless
240-510- LandlineUpper Marlboro Xo Maryland
240-462- WirelessBeltsville Sprint Spectrum L.p.
240-480- WirelessBethesda Sprint Spectrum L.p.
240-536- LandlineSandy Spring Peerless Network Of Maryland
240-929- LandlineMount Rainier Cavalier East LLC
240-614- WirelessRockville Metro PCS
240-260- LandlineMount Rainier Allegiance Telecom
240-305- WirelessBeltsville Sprint Spectrum L.p.
240-578- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-473- LandlineCollege Park Cavalier Telephone Mid-atlantic
240-613- LandlineHyattsville Us Lec Of Maryland
240-398- WirelessCabin John Sprint Spectrum L.p.
240-516- LandlineSilver Spring Us Lec Of Maryland
240-362- LandlineCumberland Verizon Maryland
240-359- LandlineIndian Head Peerless Network Of Maryland
240-523- LandlineLa Plata Xo Maryland
240-652- LandlineMechanicsville Xo Maryland
240-888- WirelessRockville New Cingular Wireless PCS - DC
240-498- WirelessBeltsville Sprint Spectrum L.p.
240-253- LandlineMount Rainier Global Crossing Local Services-md
240-440- WirelessFrederick Leap Wireless Intl DBA Cricket Comm
240-716- WirelessMount Rainier Omnipoint Communications Cap Operations
240-778- LandlineChevy Chase Xo Maryland
240-718- LandlineCallaway Xo Maryland
240-348- LandlineOxon Hill Level 3 Communications
240-684- LandlineGreenbelt Verizon Maryland
240-539- LandlineMount Rainier Peerless Network Of Maryland
240-379- LandlineFrederick Verizon Maryland
240-782- LandlineDamascus Global Crossing Local Services-md
240-316- WirelessChevy Chase Sprint Spectrum L.p.
240-479- WirelessOxon Hill Cellco Partnership DBA Verizon Wireless
240-229- LandlineWaldorf Broadwing Communications. LLC
240-764- LandlineChevy Chase Xo Maryland
240-354- WirelessBeltsville Sprint Spectrum L.p.
240-204- WirelessBethesda Cellco Partnership DBA Verizon Wireless
240-307- LandlineEmmitsburg AT&T Local
240-503- LandlineNewburg Peerless Network Of Maryland
240-715- LandlineRockville Global Crossing Local Services-md
240-615- WirelessHyattsville Metro PCS
240-727- WirelessCumberland New Cingular Wireless PCS - DC
240-470- WirelessLaurel Cellco Partnership DBA Verizon Wireless
240-794- LandlineCallaway Broadwing Communications. LLC
240-793- WirelessGaithersburg Sprint Spectrum L.p.
240-788- LandlineOxon Hill Broadwing Communications. LLC
240-258- LandlineRidge Teleport Communications America - DC
240-450- LandlineSilver Spring Cavalier Telephone Mid-atlantic
240-461- WirelessSilver Spring New Cingular Wireless PCS - DC
240-330- WirelessCabin John Sprint Spectrum L.p.
240-645- LandlineChevy Chase Xo Maryland
240-310- WirelessHagerstown Uscoc Of Cumberland DBA United States Cel Md
240-270- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-897- LandlineMount Rainier Broadwing Communications. LLC
240-541- WirelessBethesda Sprint Spectrum L.p.
240-284- LandlineFrostburg Level 3 Communications
240-458- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-453- LandlineRockville Verizon Maryland
240-220- LandlinePoolesville Peerless Network Of Maryland
240-832- WirelessBethesda Sprint Spectrum L.p.
240-691- LandlineMount Rainier Global Crossing Local Services-md
240-551- WirelessRockville Leap Wireless Intl DBA Cricket Comm
240-670- LandlineMount Rainier Local Access LLC
240-507- WirelessCabin John Cellco Partnership DBA Verizon Wireless
240-632- LandlineGaithersburg Verizon Maryland
240-358- LandlineDamascus Peerless Network Of Maryland
240-216- WirelessWaldorf Sprint Spectrum L.p.
240-468- WirelessMount Rainier Sprint Spectrum L.p.
240-376- LandlineHughesville Peerless Network Of Maryland
240-713- LandlineLaurel Peerless Network Of Maryland
240-646- LandlineLaurel Cavalier East LLC
240-734- LandlineHagerstown Bandwidth.com Clec
240-432- WirelessBeltsville Sprint Spectrum L.p.
240-224- WirelessGaithersburg Cellco Partnership DBA Verizon Wireless
240-441- WirelessOxon Hill Omnipoint Communications Cap Operations
240-743- LandlineOxon Hill Local Access LLC
240-298- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-720- LandlineGaithersburg Global Crossing Local Services-md
240-483- LandlineOxon Hill Comcast Phone Of Northern Maryland
240-228- LandlineLaurel Verizon Maryland
240-433- LandlineSilver Spring Cavalier Telephone Mid-atlantic
240-257- LandlineNanjemoy Teleport Communications America - DC
240-397- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-707- WirelessHagerstown New Cingular Wireless PCS - DC
240-212- LandlineOakland Core Communications
240-585- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-780- LandlineGaithersburg Broadwing Communications. LLC
240-704- WirelessMount Rainier Leap Wireless Intl DBA Cricket Comm
240-244- LandlineMount Rainier Starpower Communications
240-899- WirelessBethesda Omnipoint Communications Cap Operations
240-331- LandlineMount Rainier Peerless Network Of Maryland
240-694- LandlineRockville Verizon Maryland
240-300- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-487- LandlineHyattsville Us Lec Of Maryland
240-497- LandlineChevy Chase Verizon Maryland
240-238- LandlineRockville Paetec Communications
240-347- LandlineHagerstown Bandwidth.com Clec
240-208- LandlineLa Plata Peerless Network Of The District Of Columbia, Dc
240-408- WirelessRockville Leap Wireless Intl DBA Cricket Comm
240-708- WirelessColumbia Level 3 Communications
240-364- LandlineGaithersburg Cavalier East LLC
240-676- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-705- WirelessChevy Chase Leap Wireless Intl DBA Cricket Comm
240-344- WirelessFrederick New Cingular Wireless PCS - DC
240-402- LandlineCollege Park Mci Worldcom Communications
240-838- WirelessOxon Hill Omnipoint Communications Cap Operations
240-222- LandlineWaldorf Cavalier Telephone Mid-atlantic
240-303- LandlineClinton Cavalier Telephone Mid-atlantic
240-841- LandlineLaurel Allegiance Telecom
240-234- WirelessMount Rainier Cellco Partnership DBA Verizon Wireless
240-416- WirelessWaldorf New Cingular Wireless PCS - DC
240-800- LandlineChevy Chase Core Communications
240-504- WirelessSilver Spring Sprint Spectrum L.p.
240-425- LandlineCabin John Dslnet Communications Va
240-833- LandlineChevy Chase Xo Maryland
240-672- LandlineRockville Cellco Partnership DBA Verizon Wireless
240-501- WirelessSilver Spring Sprint Spectrum L.p.
240-640- WirelessWaldorf Leap Wireless Intl DBA Cricket Comm
240-319- WirelessColumbia Cellco Partnership DBA Verizon Wireless
240-773- LandlineRockville Verizon Maryland
240-883- LandlineSandy Spring Broadwing Communications. LLC
240-446- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-365- LandlineDamascus Baltimore-washington Telephone (bwt)
240-772- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-604- WirelessBeltsville Sprint Spectrum L.p.
240-912- LandlineGaithersburg Us Lec Of Maryland
240-631- LandlineGaithersburg Verizon Maryland
240-384- LandlineCallaway Peerless Network Of Maryland
240-476- WirelessSilver Spring Omnipoint Communications Cap Operations
240-250- LandlineBrandywine Peerless Network Of Maryland
240-535- WirelessSilver Spring New Cingular Wireless PCS - DC
240-426- WirelessBethesda Sprint Spectrum L.p.
240-779- LandlineSandy Spring Cavalier East LLC
240-363- LandlineKensington Global Naps South
240-550- WirelessRockville Leap Wireless Intl DBA Cricket Comm
240-217- WirelessHagerstown Omnipoint Communications Cap Operations
240-621- LandlineKensington Mci Worldcom Communications
240-530- LandlineWaldorf Local Access LLC
240-265- WirelessBethesda Sprint Spectrum L.p.
240-353- WirelessBeltsville Sprint Spectrum L.p.
240-668- LandlineDamascus Starpower Communications
240-313- LandlineHagerstown Verizon Maryland
240-606- WirelessBeltsville Sprint Spectrum L.p.
240-582- LandlineHyattsville Verizon Maryland
240-328- LandlineRockville Verizon Maryland
240-595- WirelessChevy Chase Cellco Partnership DBA Verizon Wireless
240-424- WirelessMount Rainier Sprint Spectrum L.p.
240-375- WirelessCapitol Heights Sprint Spectrum L.p.
240-895- LandlineLexington Park Verizon Maryland
240-466- WirelessMechanicsville New Cingular Wireless PCS - DC
240-477- LandlineGaithersburg Lightwave Communications
240-438- WirelessSilver Spring Sprint Spectrum L.p.
240-737- LandlineMount Rainier Cavalier East LLC
240-380- WirelessCabin John Cellco Partnership DBA Verizon Wireless
240-447- WirelessRockville New Cingular Wireless PCS - DC
240-351- WirelessBeltsville Sprint Spectrum L.p.
240-493- LandlineOxon Hill Us Lec Of Maryland
240-568- LandlineLaurel Verizon Maryland
240-296- LandlineHyattsville Cavalier Telephone Mid-atlantic
240-608- WirelessFrederick 365 Wireless
240-784- WirelessMyersville Omnipoint Communications Cap Operations
240-766- LandlineChevy Chase Xo Maryland
240-361- LandlineGaithersburg Cavalier Telephone Mid-atlantic
240-269- LandlineMount Rainier Peerless Network Of Maryland
240-687- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-205- WirelessCabin John New Cingular Wireless PCS - DC
240-654- WirelessGaithersburg New Cingular Wireless PCS - DC
240-295- LandlineLaurel Cavalier Telephone Mid-atlantic
240-626- WirelessFrederick Sprint Spectrum L.p.
240-420- LandlineHagerstown Verizon Maryland
240-281- WirelessBethesda New Cingular Wireless PCS - DC
240-846- LandlineClinton Xo Maryland
240-616- LandlineCollege Park Mci Worldcom Communications
240-405- LandlineFrederick Us Lec Of Maryland
240-243- LandlineGaithersburg Allegiance Telecom
240-381- WirelessSilver Spring New Cingular Wireless PCS - DC
240-542- LandlineCollege Park Us Lec Of Maryland
240-237- LandlineCallaway Teleport Communications America - DC
240-246- LandlineGaithersburg Starpower Communications
240-747- LandlineMount Rainier Cavalier East LLC
240-287- LandlineHancock Core Communications
240-485- LandlineCabin John Us Lec Of Maryland
240-755- LandlineLaurel Comcast Phone Of Northern Maryland
240-882- WirelessCapitol Heights Sprint Spectrum L.p.
240-554- LandlineLaurel Allegiance Telecom
240-669- LandlineKensington Comcast Phone Of Northern Maryland
240-254- LandlineHughesville Teleport Communications America - DC
240-439- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-526- LandlineLeonardtown Peerless Network Of Maryland
240-434- LandlineLeonardtown Broadwing Communications. LLC
240-675- WirelessMyersville New Cingular Wireless PCS - DC
240-612- LandlineMount Rainier Tw Telecom Of Maryland LLC
240-650- LandlineCabin John Broadvox-clec - DC
240-209- LandlineIndian Head Peerless Network Of The District Of Columbia, Dc
240-548- LandlineMount Rainier Allegiance Telecom
240-337- LandlineMount Rainier Peerless Network Of Maryland
240-818- LandlineSmithsburg Verizon Maryland
240-525- LandlineUpper Marlboro Peerless Network Of Maryland
240-471- LandlineSilver Spring Global Crossing Local Services-md
240-986- LandlineNanjemoy Xo Maryland
240-643- WirelessSilver Spring Omnipoint Communications Cap Operations
240-607- LandlineWaldorf Global Crossing Local Services-md
240-423- WirelessSilver Spring Omnipoint Communications Cap Operations
240-324- LandlineClarksville Ymax Communications Corp.
240-404- LandlineGaithersburg Xo Maryland
240-599- LandlineRockville Broadwing Communications. LLC
240-538- LandlineLeonardtown Xo Maryland
240-368- LandlineWaldorf Peerless Network Of Maryland
240-533- LandlineMount Rainier Teleport Communications America - DC
240-277- WirelessBethesda Sprint Spectrum L.p.
240-699- LandlineAdamstown Verizon Maryland
240-696- LandlineHyattsville Level 3 Communications
240-352- LandlineLa Plata Peerless Network Of Maryland
240-464- LandlineChevy Chase Sprint Spectrum L.p.
240-286- WirelessBethesda Sprint Spectrum L.p.
240-213- LandlineWaldorf Peerless Network Of The District Of Columbia, Dc
240-508- WirelessCapitol Heights Sprint Spectrum L.p.
240-436- LandlineIjamsville Telcove Operations
240-597- LandlineGaithersburg Peerless Network Of Maryland
240-519- WirelessBethesda Sprint Spectrum L.p.
240-367- WirelessFrederick Sprint Spectrum L.p.
240-522- WirelessCumberland Sprint Spectrum L.p.
240-486- WirelessGlenn Dale Omnipoint Communications Cap Operations
240-374- LandlineLaurel Global Crossing Local Services-md
240-803- WirelessCumberland New Cingular Wireless PCS - DC
240-266- LandlineMount Rainier Peerless Network Of Maryland
240-320- LandlineWaldorf Cavalier East LLC
240-644- LandlineChevy Chase Xo Maryland
240-790- LandlineMount Rainier Broadwing Communications. LLC
240-776- LandlineLa Plata Broadwing Communications. LLC
240-210- WirelessWaldorf New Cingular Wireless PCS - DC
240-500- LandlineHagerstown Us Lec Of Maryland
240-565- WirelessLaurel Omnipoint Communications Cap Operations
240-215- LandlineFrederick Telcove Operations
240-731- WirelessRockville New Cingular Wireless PCS - DC
240-581- LandlineLaurel Paetec Communications - DC
240-826- LandlineRockville Verizon Maryland
240-489- LandlinePoolesville Xo Maryland
240-201- LandlineRidge Peerless Network Of The District Of Columbia, Dc
240-385- LandlineMyersville Verizon Maryland
240-294- LandlineLaurel Xo Maryland
240-401- WirelessRockville New Cingular Wireless PCS - DC
240-812- LandlinePoolesville Global Crossing Local Services-md
240-843- LandlineCollege Park Allegiance Telecom
240-272- WirelessBethesda Sprint Spectrum L.p.
240-414- LandlineMount Rainier Peerless Network Of Maryland
240-417- WirelessCapitol Heights Sprint Spectrum L.p.
240-394- WirelessMount Airy New Cingular Wireless PCS - DC
240-561- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-577- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-575- LandlineFrederick Level 3 Communications
240-206- LandlineGlenn Dale Xo Maryland
240-518- WirelessWaldorf Sprint Spectrum L.p.
240-671- WirelessMount Rainier Sprint Spectrum L.p.
240-465- LandlineMount Rainier Peerless Network Of Maryland
240-435- WirelessWaldorf Cellco Partnership DBA Verizon Wireless
240-456- LandlineLaurel Verizon Maryland
240-903- LandlineIndian Head Comcast Phone Of Northern Maryland
240-865- LandlineBaltimore Level 3 Communications
240-431- WirelessTall Timbers Sprint Spectrum L.p.
240-304- WirelessMount Rainier Sprint Spectrum L.p.
240-457- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-979- LandlineCumberland Level 3 Communications
240-993- LandlineIndian Head Xo Maryland
240-231- LandlineHagerstown Core Communications
240-415- LandlineFrederick Ymax Communications Corp.
240-207- LandlineDamascus Cavalier East LLC
240-444- WirelessLaurel Cellco Partnership DBA Verizon Wireless
240-268- LandlineRockville Allegiance Telecom
240-712- WirelessColumbia Cellco Partnership DBA Verizon Wireless
240-357- WirelessFrederick Cellco Partnership DBA Verizon Wireless
240-263- WirelessBethesda Sprint Spectrum L.p.
240-372- WirelessGaithersburg Sprint Spectrum L.p.
240-309- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-449- WirelessGaithersburg New Cingular Wireless PCS - DC
240-706- WirelessChevy Chase Leap Wireless Intl DBA Cricket Comm
240-528- LandlineHughesville Broadwing Communications. LLC
240-988- WirelessBeltsville Sprint Spectrum L.p.
240-317- LandlineCallaway Starpower Communications
240-308- WirelessDamascus New Cingular Wireless PCS - DC
240-997- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-271- WirelessBethesda New Cingular Wireless PCS - DC
240-620- LandlineRockville Mci Worldcom Communications
240-543- WirelessBethesda Sprint Spectrum L.p.
240-406- WirelessRockville Leap Wireless Intl DBA Cricket Comm
240-242- LandlineKensington Starpower Communications
240-949- LandlineMount Rainier Cavalier East LLC
240-804- LandlineNewburg Xo Maryland
240-880- LandlineChevy Chase Broadwing Communications. LLC
240-762- WirelessMount Rainier Cellco Partnership DBA Verizon Wireless
240-236- LandlineFrederick Verizon Maryland
240-318- LandlineClinton Verizon Maryland
240-428- LandlineRockville Bandwidth.com Clec
240-529- LandlineFrederick Verizon Maryland
240-494- LandlineMount Rainier Cavalier East LLC
240-371- LandlineMount Rainier Peerless Network Of Maryland
240-617- Unknown Shentel Communications
240-515- WirelessBethesda New Cingular Wireless PCS - DC
240-892- LandlineUpper Marlboro Broadwing Communications. LLC
240-512- LandlineCollege Park Core Communications
240-392- LandlineOxon Hill Starpower Communications
240-442- LandlineOakland Verizon Maryland
240-278- WirelessLaurel Cellco Partnership DBA Verizon Wireless
240-339- LandlineUpper Marlboro Cavalier East LLC
240-802- WirelessBethesda 365 Wireless
240-695- LandlineTemple Hills Verizon Maryland
240-864- LandlineRockville Cavalier East LLC
240-396- LandlineMount Rainier Global Crossing Local Services-md
240-325- LandlineDamascus Core Communications
240-767- LandlineCapitol Heights Cavalier East LLC
240-288- LandlineThurmont Comcast Phone Of Northern Maryland
240-247- LandlineMount Rainier Allegiance Telecom
240-662- LandlineSilver Spring Verizon Maryland
240-403- LandlineRockville Cavalier Telephone Mid-atlantic
240-488- LandlineOakland Shentel Communications
240-383- WirelessChevy Chase New Cingular Wireless PCS - DC
240-750- WirelessGaithersburg New Cingular Wireless PCS - DC
240-674- WirelessFrederick Sprint Spectrum L.p.
240-395- LandlineBethesda Cavalier Telephone Mid-atlantic
240-355- WirelessBeltsville Sprint Spectrum L.p.
240-315- LandlineFrederick Verizon Maryland
240-297- LandlineCollege Park Level 3 Communications
240-490- WirelessMiddletown Omnipoint Communications Cap Operations
240-366- LandlineWilliamsport AT&T Local
240-722- LandlineSandy Spring Global Crossing Local Services-md
240-306- LandlineGaithersburg Allegiance Telecom
240-514- LandlineCabin John Us Lec Of Maryland
240-686- LandlineGaithersburg Verizon Maryland
240-532- WirelessOxon Hill Cellco Partnership DBA Verizon Wireless
240-651- WirelessFrederick Halo Wireless Services
240-393- WirelessCabin John Cellco Partnership DBA Verizon Wireless
240-332- LandlineNewburg Peerless Network Of Maryland
240-753- LandlineRockville Telcove Operations
240-413- WirelessHyattsville Omnipoint Communications Cap Operations
240-682- LandlineWaldorf Starpower Communications
240-427- LandlineWaldorf Xo Maryland
240-754- LandlineWaldorf Level 3 Communications
240-321- WirelessOakland Uscoc Of Cumberland DBA United States Cel Md
240-475- WirelessSilver Spring New Cingular Wireless PCS - DC
240-725- LandlineLexington Park Verizon Maryland
240-280- LandlineLaurel Comcast Phone Of Northern Maryland
240-625- WirelessHagerstown Sprint Spectrum L.p.
240-492- LandlineCapitol Heights Us Lec Of Maryland
240-845- LandlineChevy Chase Xo Maryland
240-386- LandlineGaithersburg Verizon Maryland
240-279- LandlineWaldorf Core Communications
240-314- LandlineRockville Verizon Maryland
240-964- LandlineCumberland Verizon Maryland
240-274- WirelessBethesda New Cingular Wireless PCS - DC
240-573- LandlineUpper Marlboro Global Crossing Local Services-md
240-777- LandlineRockville Verizon Maryland
240-624- LandlineGreenbelt Verizon Maryland
240-290- LandlineMount Rainier Allegiance Telecom
240-469- WirelessHagerstown Sprint Spectrum L.p.
240-898- LandlineMount Rainier Broadwing Communications. LLC
240-560- LandlineChevy Chase Xo Maryland
240-378- LandlineCumberland Core Communications
240-203- LandlineHagerstown Bandwidth.com
240-455- LandlineOxon Hill Paetec Communications
240-409- WirelessFrederick New Cingular Wireless PCS - DC
240-340- WirelessBethesda Sprint Spectrum L.p.
240-491- LandlineMount Rainier Global Crossing Local Services-md
240-389- LandlineSandy Spring Atx Telecommunications Services, Ltd
240-293- LandlineMount Rainier Starpower Communications
240-765- LandlineChevy Chase Xo Maryland
240-920- LandlineCumberland Level 3 Communications
240-221- LandlineRockville Verizon Maryland
240-580- WirelessCumberland Sprint Spectrum L.p.
240-343- WirelessHancock Cellco Partnership DBA Verizon Wireless
240-499- LandlineCabin John Us Lec Of Maryland
240-630- LandlineMount Rainier Bandwidth.com Clec
240-350- WirelessBeltsville Sprint Spectrum L.p.
240-437- LandlineSandy Spring Xo Maryland
240-723- LandlineSilver Spring Cellco Partnership DBA Verizon Wireless
240-938- WirelessAshton Omnipoint Communications Cap Operations
240-326- LandlineUpper Marlboro Cavalier Telephone Mid-atlantic
240-544- LandlineGlenn Dale Us Lec Of Maryland
240-527- LandlineHagerstown Verizon Maryland
240-506- WirelessRockville New Cingular Wireless PCS - DC
240-502- WirelessSilver Spring Sprint Spectrum L.p.
240-333- LandlineMount Rainier Cavalier East LLC
240-976- Unknown Baltimore-washington Telephone (bwt)
240-400- WirelessBethesda Sprint Spectrum L.p.
240-214- LandlineMechanicsville Peerless Network Of The District Of Columbia, Dc
240-965- LandlineCollege Park Paetec Communications
240-233- LandlineNewburg Teleport Communications America - DC
240-520- WirelessHagerstown Sprint Spectrum L.p.
240-338- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-603- WirelessBeltsville Sprint Spectrum L.p.
240-839- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-724- LandlineMount Rainier Cavalier East LLC
240-627- LandlineMount Rainier Global Crossing Local Services-md
240-823- LandlineBrandywine Xo Maryland
240-837- LandlineHughesville Xo Maryland
240-245- LandlineGlenn Dale Starpower Communications
240-745- LandlineDamascus Xo Maryland
240-813- LandlineGaithersburg Atx Telecommunications Services, Ltd
240-399- LandlineChevy Chase Xo Maryland
240-390- LandlineSandy Spring Cavalier Telephone Mid-atlantic
240-848- WirelessGaithersburg Sprint Spectrum L.p.
240-546- LandlineClinton Us Lec Of Maryland
240-407- LandlineMount Rainier Global Crossing Local Services-md
240-391- LandlineMount Rainier Global Crossing Local Services-md
240-341- LandlineAdamstown Mci Worldcom Communications
240-336- LandlineBethesda Core Communications
240-349- LandlineLa Plata Global Crossing Local Services-md
240-558- LandlineKensington Cavalier Telephone Mid-atlantic
240-329- LandlineHagerstown Level 3 Communications
240-282- LandlineMechanicsville Peerless Network Of Maryland
240-478- WirelessCabin John New Cingular Wireless PCS - DC
240-249- LandlineMechanicsville Teleport Communications America - DC
240-821- LandlineSilver Spring Lightwave Communications
240-370- WirelessBethesda Sprint Spectrum L.p.
240-629- LandlineFrederick Verizon Maryland
240-421- WirelessRockville Omnipoint Communications Cap Operations
240-901- Unknown Centurylink Communications LLC
240-342- LandlineSandy Spring Starpower Communications
240-893- WirelessSilver Spring New Cingular Wireless PCS - DC
240-683- LandlineGaithersburg Verizon Maryland
240-255- LandlinePoolesville Peerless Network Of Maryland
240-334- LandlineMount Rainier Global Crossing Local Services-md
240-369- LandlineMount Airy Core Communications
240-482- LandlineCabin John Us Lec Of Maryland
240-291- WirelessHagerstown New Cingular Wireless PCS - DC
240-377- LandlineIndian Head Global Crossing Local Services-md
240-842- LandlineGlenn Dale Allegiance Telecom
240-600- WirelessMount Rainier Sprint Spectrum L.p.
240-688- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-925- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-863- LandlineLaurel Tw Telecom Of Maryland LLC
240-273- LandlineMount Rainier Broadwing Communications. LLC
240-855- WirelessCabin John Sprint Spectrum L.p.
240-460- WirelessSilver Spring New Cingular Wireless PCS - DC
240-876- WirelessBethesda Sprint Spectrum L.p.
240-241- LandlineChevy Chase Starpower Communications
240-744- LandlineMount Rainier Broadwing Communications. LLC
240-335- LandlineGlenn Dale Cavalier Telephone Mid-atlantic
240-235- LandlineBethesda Paetec Communications
240-430- LandlineKensington Cavalier Telephone Mid-atlantic
240-801- WirelessGaithersburg Cellco Partnership DBA Verizon Wireless
240-678- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-472- WirelessSilver Spring New Cingular Wireless PCS - DC
240-619- LandlineChevy Chase Mci Worldcom Communications
240-857- LandlineMount Rainier Tw Telecom Of Maryland LLC
240-323- LandlineEmmitsburg Core Communications
240-601- WirelessBeltsville Sprint Spectrum L.p.
240-602- WirelessBeltsville Sprint Spectrum L.p.
240-232- LandlineMount Rainier Broadwing Communications. LLC
240-509- LandlineCrofton Bandwidth.com Clec
240-276- LandlineRockville Verizon Maryland
240-552- WirelessRockville Leap Wireless Intl DBA Cricket Comm
240-356- LandlineFrederick Level 3 Communications
240-513- WirelessHagerstown Sprint Spectrum L.p.
240-566- LandlineFrederick Verizon Maryland
240-505- WirelessSilver Spring Omnipoint Communications Cap Operations
240-868- LandlineMount Rainier Cavalier East LLC
240-452- LandlineHagerstown Lumos Networks Inc. - VA
240-239- LandlineLeonardtown Core Communications
240-586- LandlineFrederick Verizon Maryland
240-752- LandlineBethesda Telcove Operations
240-701- WirelessSilver Spring Leap Wireless Intl DBA Cricket Comm
240-283- LandlineKensington Paetec Communications
240-327- LandlineGaithersburg Core Communications
240-289- LandlineOxon Hill Cavalier Telephone Mid-atlantic
240-360- WirelessLaurel Omnipoint Communications Cap Operations
240-448- WirelessWaldorf Sprint Spectrum L.p.
240-418- WirelessBeltsville Sprint Spectrum L.p.
240-463- WirelessSilver Spring New Cingular Wireless PCS - DC
240-783- WirelessBethesda Mte DBA Mte Paging Network
240-524- LandlineLaurel Peerless Network Of Maryland
240-429- WirelessSilver Spring Cellco Partnership DBA Verizon Wireless
240-256- LandlineLeonardtown Teleport Communications America - DC
240-312- LandlineCapitol Heights Cavalier Telephone Mid-atlantic
240-225- LandlineFrederick Core Communications
240-200- LandlineMount Rainier Bandwidth.com Clec
240-248- LandlineRidge Peerless Network Of Maryland
240-345- LandlineSandy Spring Level 3 Communications
240-638- LandlineMount Rainier Broadwing Communications. LLC
240-587- WirelessLeonardtown Cellco Partnership DBA Verizon Wireless
240-299- WirelessWaldorf Sprint Spectrum L.p.
240-262- WirelessCallaway Sprint Spectrum L.p.
240-388- WirelessGaithersburg Sprint Spectrum L.p.
240-751- LandlineGaithersburg Telcove Operations
240-382- LandlineHagerstown Teleport Communications America
240-757- LandlineMount Rainier Peerless Network Of Maryland
240-547- LandlineLaurel Level 3 Communications
240-251- LandlineHighfield Core Communications
240-230- LandlineHughesville Global Crossing Local Services-md
240-412- WirelessWaldorf Sprint Spectrum L.p.
240-223- LandlineMount Rainier Allegiance Telecom
240-285- LandlineFrederick Cellco Partnership DBA Verizon Wireless
240-422- WirelessFrederick Omnipoint Communications Cap Operations
240-685- LandlineBrandywine Global Crossing Local Services-md
240-322- LandlineMccoole Core Communications
240-445- WirelessBethesda Sprint Spectrum L.p.