Area Code 301 Location - Maryland
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Cities in Areacode 301
- 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 |
|---|---|---|---|
| 301-977- | Landline | Gaithersburg | Verizon Maryland |
| 301-515- | Landline | Gaithersburg | Verizon Maryland |
| 301-917- | Landline | Rockville | Starpower Communications |
| 301-465- | Wireless | Myersville | Sprint Spectrum L.p. |
| 301-436- | Landline | Hyattsville | Verizon Maryland |
| 301-855- | Landline | Upper Marlboro | Verizon Maryland |
| 301-446- | Landline | Greenbelt | Verizon Maryland |
| 301-283- | Landline | Bryans Road | Verizon Maryland |
| 301-848- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| 301-327- | Landline | Upper Marlboro | Comcast Phone Of Northern Maryland |
| 301-558- | Wireless | College Park | Usa Mobility Wireless |
| 301-307- | Landline | College Park | Verizon Maryland |
| 301-871- | Landline | Rockville | Verizon Maryland |
| 301-793- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| 301-766- | Landline | Hagerstown | Verizon Maryland |
| 301-937- | Landline | Beltsville | Verizon Maryland |
| 301-809- | Landline | Bowie | Verizon Maryland |
| 301-699- | Landline | Hyattsville | Verizon Maryland |
| 301-317- | Landline | Laurel | Verizon Maryland |
| 301-964- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| 301-504- | Landline | Silver Spring | Verizon Maryland |
| 301-928- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-539- | Landline | La Plata | Teleport Communications America - DC |
| 301-637- | Landline | Rockville | Level 3 Communications |
| 301-656- | Landline | Chevy Chase | Verizon Maryland |
| 301-256- | Landline | Laurel | Mci Worldcom Communications |
| 301-908- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-841- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-968- | Landline | Bethesda | Mci Worldcom Communications |
| 301-580- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-500- | Landline | Chevy Chase | Xo Maryland |
| 301-351- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-496- | Landline | Bethesda | Verizon Maryland |
| 301-242- | Landline | Brandywine | Mcimetro Access Transmission Services LLC |
| 301-778- | Landline | Capitol Heights | Mci Worldcom Communications |
| 301-875- | Landline | Laurel | Cellco Partnership DBA Verizon Wireless |
| 301-304- | Landline | Frederick | Comcast Phone Of Northern Maryland |
| 301-444- | Landline | Gaithersburg | Verizon Maryland |
| 301-622- | Landline | Silver Spring | Verizon Maryland |
| 301-884- | Landline | Mechanicsville | Verizon Maryland |
| 301-667- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| 301-657- | Landline | Chevy Chase | Verizon Maryland |
| 301-509- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-361- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| 301-892- | Landline | Hyattsville | Verizon Maryland |
| 301-980- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-716- | Wireless | Beltsville | Verizon Maryland |
| 301-961- | Landline | Chevy Chase | Verizon Maryland |
| 301-306- | Landline | Lanham | Verizon Maryland |
| 301-237- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-759- | Landline | Cumberland | Verizon Maryland |
| 301-865- | Landline | New Market | Verizon Maryland |
| 301-886- | Landline | Laurel | Verizon Maryland |
| 301-783- | Landline | Cumberland | New Frontiers Telecommunications |
| 301-408- | Landline | Hyattsville | Verizon Maryland |
| 301-691- | Landline | Poolesville | Teleport Communications America - DC |
| 301-492- | Landline | Chevy Chase | Verizon Maryland |
| 301-785- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-206- | Landline | Laurel | Verizon Maryland |
| 301-719- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-665- | Landline | Hagerstown | Verizon Maryland |
| 301-760- | Landline | Bethesda | Level 3 Communications |
| 301-430- | Landline | Bowie | Verizon Maryland |
| 301-313- | Landline | Greenbelt | Verizon Maryland |
| 301-799- | Landline | Keedysville | Core Communications |
| 301-202- | Wireless | Chevy Chase | New Cingular Wireless PCS - DC |
| 301-978- | Landline | Gaithersburg | Verizon Maryland |
| 301-722- | Landline | Cumberland | Verizon Maryland |
| 301-914- | Landline | Mc Henry | Mountain Communications DBA Procom |
| 301-727- | Landline | Capitol Heights | Baltimore-washington Telephone (bwt) |
| 301-227- | Landline | Glen Echo | Verizon Maryland |
| 301-418- | Landline | Frederick | Verizon Maryland |
| 301-385- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-617- | Landline | Laurel | Verizon Maryland |
| 301-223- | Landline | Williamsport | Verizon Maryland |
| 301-365- | Landline | Bethesda | Verizon Maryland |
| 301-204- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-344- | Landline | Greenbelt | Verizon Maryland |
| 301-912- | Landline | Odenton | Verizon Maryland |
| 301-314- | Landline | Hyattsville | Paetec Communications |
| 301-214- | Landline | Rockville | Verizon Maryland |
| 301-605- | Landline | Rockville | Verizon Maryland |
| 301-816- | Landline | Rockville | Verizon Maryland |
| 301-377- | Landline | Laurel | Comcast Phone Of Northern Maryland |
| 301-731- | Landline | Lanham | Verizon Maryland |
| 301-467- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-845- | Landline | Walkersville | Verizon Maryland |
| 301-386- | Landline | Hyattsville | Verizon Maryland |
| 301-879- | Landline | Silver Spring | Verizon Maryland |
| 301-474- | Landline | Greenbelt | Verizon Maryland |
| 301-577- | Landline | Lanham | Verizon Maryland |
| 301-538- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-384- | Landline | Silver Spring | Verizon Maryland |
| 301-772- | Landline | Hyattsville | Verizon Maryland |
| 301-735- | Landline | Suitland | Verizon Maryland |
| 301-768- | Landline | Cabin John | Level 3 Communications |
| 301-239- | Wireless | Hyattsville | Verizon Maryland |
| 301-457- | Landline | Silver Spring | Verizon Maryland |
| 301-596- | Landline | Columbia | Verizon Maryland |
| 301-748- | Wireless | Frederick | Sprint Spectrum L.p. |
| 301-519- | Landline | Gaithersburg | Verizon Maryland |
| 301-503- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-808- | Landline | Capitol Heights | Verizon Maryland |
| 301-677- | Landline | Glenn Dale | Teleport Communications America - DC |
| 301-743- | Landline | Indian Head | Verizon Maryland |
| 301-487- | Landline | Myersville | Verizon Maryland |
| 301-829- | Landline | Mount Airy | Verizon Maryland |
| 301-893- | Landline | Waldorf | Verizon Maryland |
| 301-673- | Landline | Frederick | New Frontiers Telecommunications |
| 301-620- | Landline | Frederick | Verizon Maryland |
| 301-551- | Landline | Kensington | Baltimore-washington Telephone (bwt) |
| 301-267- | Wireless | Greenbelt | Sprint Spectrum L.p. |
| 301-662- | Landline | Frederick | Verizon Maryland |
| 301-579- | Landline | Brandywine | Verizon Maryland |
| 301-631- | Landline | Frederick | Verizon Maryland |
| 301-781- | Landline | Frostburg | New Frontiers Telecommunications |
| 301-724- | Landline | Cumberland | Verizon Maryland |
| 301-259- | Landline | Issue | Verizon Maryland |
| 301-484- | Landline | Oxon Hill | Comcast Phone Of Northern Maryland |
| 301-945- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-462- | Wireless | Myersville | Sprint Spectrum L.p. |
| 301-635- | Landline | Myersville | New Frontiers Telecommunications |
| 301-592- | Landline | Silver Spring | Verizon Maryland |
| 301-732- | Wireless | Greenbelt | Metro PCS |
| 301-710- | Landline | Waldorf | Level 3 Communications |
| 301-998- | Landline | Rockville | Verizon Maryland |
| 301-257- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-770- | Landline | Rockville | Verizon Maryland |
| 301-975- | Landline | Gaithersburg | Verizon Maryland |
| 301-597- | Landline | Hancock | New Frontiers Telecommunications |
| 301-383- | Landline | Glenn Dale | Comcast Phone Of Northern Maryland |
| 301-776- | Landline | Laurel | Verizon Maryland |
| 301-625- | Landline | Silver Spring | Verizon Maryland |
| 301-801- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-658- | Landline | Sandy Spring | Teleport Communications America - DC |
| 301-423- | Landline | Temple Hills | Verizon Maryland |
| 301-388- | Landline | Silver Spring | Verizon Maryland |
| 301-951- | Landline | Chevy Chase | Verizon Maryland |
| 301-623- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-712- | Landline | Frederick | Mci Worldcom Communications |
| 301-919- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-901- | Landline | Greenbelt | Verizon Maryland |
| 301-890- | Landline | Beltsville | Verizon Maryland |
| 301-403- | Landline | Hyattsville | Verizon Maryland |
| 301-905- | Landline | Silver Spring | Verizon Maryland |
| 301-652- | Landline | Chevy Chase | Verizon Maryland |
| 301-881- | Landline | Rockville | Verizon Maryland |
| 301-246- | Landline | Nanjemoy | Verizon Maryland |
| 301-537- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-969- | Landline | Brunswick | Comcast Phone Of Northern Maryland |
| 301-706- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-681- | Landline | Silver Spring | Verizon Maryland |
| 301-585- | Landline | Silver Spring | Verizon Maryland |
| 301-983- | Landline | Bethesda | Verizon Maryland |
| 301-584- | Landline | Silver Spring | Baltimore-washington Telephone (bwt) |
| 301-514- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| 301-863- | Landline | Lexington Park | Verizon Maryland |
| 301-247- | Wireless | Leonardtown | New Cingular Wireless PCS - DC |
| 301-477- | Landline | College Park | Comcast Phone Of Northern Maryland |
| 301-749- | Landline | Oxon Hill | Verizon Maryland |
| 301-986- | Landline | Chevy Chase | Verizon Maryland |
| 301-904- | Wireless | Leonardtown | Cellco Partnership DBA Verizon Wireless |
| 301-230- | Landline | Rockville | Verizon Maryland |
| 301-909- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-963- | Landline | Gaithersburg | Verizon Maryland |
| 301-761- | Landline | Kensington | Level 3 Communications |
| 301-709- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-819- | Wireless | Silver Spring | Verizon Maryland |
| 301-296- | Landline | Rockville | Mci Worldcom Communications |
| 301-882- | Landline | New Market | Core Communications |
| 301-791- | Landline | Hagerstown | Verizon Maryland |
| 301-466- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-373- | Landline | Hollywood | Verizon Maryland |
| 301-639- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| 301-765- | Landline | Bethesda | Verizon Maryland |
| 301-490- | Landline | Laurel | Verizon Maryland |
| 301-547- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-878- | Landline | Baltimore | Verizon Maryland |
| 301-323- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| 301-348- | Landline | Kensington | Mci Worldcom Communications |
| 301-679- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-396- | Landline | Waldorf | Verizon Maryland |
| 301-653- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| 301-392- | Landline | La Plata | Verizon Maryland |
| 301-651- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-693- | Wireless | Frederick | Omnipoint Communications Cap Operations |
| 301-412- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-244- | Landline | Rockville | Telcove Operations |
| 301-469- | Landline | Bethesda | Verizon Maryland |
| 301-220- | Landline | Greenbelt | Verizon Maryland |
| 301-689- | Landline | Frostburg | Verizon Maryland |
| 301-827- | Landline | Bethesda | Verizon Maryland |
| 301-853- | Landline | Hyattsville | Verizon Maryland |
| 301-546- | Landline | Landover | Verizon Maryland |
| 301-459- | Landline | Lanham | Verizon Maryland |
| 301-315- | Landline | Rockville | Verizon Maryland |
| 301-319- | Landline | Rockville | Verizon Maryland |
| 301-815- | Landline | Frederick | Verizon Maryland |
| 301-353- | Landline | Gaithersburg | Verizon Maryland |
| 301-927- | Landline | Hyattsville | Verizon Maryland |
| 301-453- | Landline | Kitzmiller | Verizon Maryland |
| 301-895- | Landline | Grantsville | Verizon Maryland |
| 301-225- | Landline | Glenn Dale | Teleport Communications America - DC |
| 301-549- | Landline | Laurel | Verizon Maryland |
| 301-200- | Landline | Indian Head | Bandwidth.com Clec |
| 301-638- | Landline | Waldorf | Verizon Maryland |
| 301-318- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-583- | Landline | Hyattsville | Verizon Maryland |
| 301-698- | Landline | Frederick | Verizon Maryland |
| 301-359- | Landline | Westernport | Verizon Maryland |
| 301-941- | Landline | Chevy Chase | Verizon Maryland |
| 301-528- | Landline | Gaithersburg | Verizon Maryland |
| 301-536- | Wireless | Leonardtown | Sprint Spectrum L.p. |
| 301-989- | Landline | Silver Spring | Verizon Maryland |
| 301-372- | Landline | Brandywine | Verizon Maryland |
| 301-842- | Landline | Clear Spring | Verizon Maryland |
| 301-394- | Landline | Beltsville | Verizon Maryland |
| 301-374- | Landline | Waldorf | Verizon Maryland |
| 301-495- | Landline | Silver Spring | Verizon Maryland |
| 301-663- | Landline | Frederick | Verizon Maryland |
| 301-843- | Landline | Waldorf | Verizon Maryland |
| 301-480- | Landline | Bethesda | Verizon Maryland |
| 301-804- | Landline | Ashton 26 | Peerless Network |
| 301-437- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-522- | Wireless | Rockville | Verizon Maryland |
| 301-688- | Landline | Laurel | Verizon Maryland |
| 301-692- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-407- | Landline | Poolesville | Verizon Maryland |
| 301-349- | Landline | Poolesville | Verizon Maryland |
| 301-601- | Landline | Gaithersburg | Verizon Maryland |
| 301-976- | Unknown | Baltimore-washington Telephone (bwt) | |
| 301-636- | Landline | Hyattsville | Verizon Maryland |
| 301-553- | Wireless | Waldorf | Usa Mobility Wireless |
| 301-387- | Landline | Swanton | Verizon Maryland |
| 301-769- | Landline | Avenue | Verizon Maryland |
| 301-294- | Landline | Rockville | Verizon Maryland |
| 301-708- | Wireless | Greenbelt | Cavalier Telephone Mid-atlantic |
| 301-725- | Landline | Laurel | Verizon Maryland |
| 301-309- | Landline | Rockville | Verizon Maryland |
| 301-224- | Wireless | Chevy Chase | Usa Mobility Wireless |
| 301-906- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-777- | Landline | Cumberland | Verizon Maryland |
| 301-779- | Landline | Hyattsville | Verizon Maryland |
| 301-898- | Landline | Walkersville | Verizon Maryland |
| 301-277- | Landline | Hyattsville | Verizon Maryland |
| 301-272- | Landline | Rockville | Mci Worldcom Communications |
| 301-280- | Landline | Chevy Chase | Verizon Maryland |
| 301-715- | Landline | Upper Marlboro | Teleport Communications America - DC |
| 301-568- | Landline | Suitland | Verizon Maryland |
| 301-944- | Landline | Gaithersburg | Mcimetro Access Transmission Services LLC |
| 301-669- | Landline | Suitland | Verizon Maryland |
| 301-721- | Landline | Gaithersburg | Verizon Maryland |
| 301-324- | Landline | Capitol Heights | Verizon Maryland |
| 301-640- | Landline | Gaithersburg | Verizon Maryland |
| 301-397- | Wireless | Greenbelt | Verizon Maryland |
| 301-701- | Wireless | Hyattsville | Verizon Maryland |
| 301-694- | Landline | Frederick | Verizon Maryland |
| 301-821- | Landline | Laurel | AT&T Local |
| 301-587- | Landline | Silver Spring | Verizon Maryland |
| 301-864- | Landline | Hyattsville | Verizon Maryland |
| 301-340- | Landline | Rockville | Verizon Maryland |
| 301-493- | Landline | Rockville | Verizon Maryland |
| 301-754- | Landline | Silver Spring | Verizon Maryland |
| 301-756- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| 301-824- | Landline | Smithsburg | Verizon Maryland |
| 301-753- | Landline | Oxon Hill | Verizon Maryland |
| 301-647- | Wireless | Laurel | Verizon Maryland |
| 301-255- | Landline | Rockville | Verizon Maryland |
| 301-633- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-439- | Landline | Hyattsville | Verizon Maryland |
| 301-932- | Landline | La Plata | Verizon Maryland |
| 301-877- | Landline | Clinton | Verizon Maryland |
| 301-619- | Landline | Frederick | Verizon Maryland |
| 301-228- | Landline | Frederick | Verizon Maryland |
| 301-264- | Landline | Mount Savage | Verizon Maryland |
| 301-836- | Landline | Temple Hills | Verizon Maryland |
| 301-491- | Wireless | Hagerstown | Uscoc Of Cumberland DBA United States Cel Md |
| 301-738- | Landline | Rockville | Verizon Maryland |
| 301-938- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-789- | Landline | Hyattsville | Core Communications - PA |
| 301-390- | Landline | Bowie | Verizon Maryland |
| 301-343- | Wireless | Capitol Heights | Sprint Spectrum L.p. |
| 301-866- | Landline | Lexington Park | Verizon Maryland |
| 301-973- | Landline | Glenn Dale | Verizon Maryland |
| 301-475- | Landline | Leonardtown | Verizon Maryland |
| 301-690- | Landline | Leonardtown | Idt America Corp |
| 301-213- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-717- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-218- | Landline | Bowie | Verizon Maryland |
| 301-368- | Landline | Damascus | Verizon Maryland |
| 301-425- | Wireless | Beltsville | Verizon Maryland |
| 301-542- | Landline | Waldorf | Teleport Communications America - DC |
| 301-289- | Landline | College Park | Mci Worldcom Communications |
| 301-796- | Landline | College Park | Verizon Maryland |
| 301-293- | Landline | Myersville | Verizon Maryland |
| 301-929- | Landline | Kensington | Verizon Maryland |
| 301-226- | Landline | Hyattsville | Verizon Maryland |
| 301-655- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-456- | Landline | Mount Rainier | Comcast Phone Of Northern Maryland |
| 301-680- | Landline | Silver Spring | Verizon Maryland |
| 301-341- | Landline | Hyattsville | Verizon Maryland |
| 301-628- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-586- | Landline | Beltsville | Verizon Maryland |
| 301-982- | Landline | Greenbelt | Verizon Maryland |
| 301-832- | Landline | Mount Rainier | AT&T Local |
| 301-548- | Landline | Gaithersburg | Verizon Maryland |
| 301-516- | Landline | Suitland | Verizon Maryland |
| 301-440- | Wireless | Capitol Heights | Sprint Spectrum L.p. |
| 301-615- | Wireless | Greenbelt | Verizon Maryland |
| 301-497- | Landline | Laurel | Verizon Maryland |
| 301-705- | Landline | Waldorf | Verizon Maryland |
| 301-222- | Landline | Bethesda | Cavalier Telephone Mid-atlantic |
| 301-823- | Landline | Mount Rainier | AT&T Local |
| 301-420- | Landline | Suitland | Verizon Maryland |
| 301-889- | Landline | Glenn Dale | Verizon Maryland |
| 301-535- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| 301-872- | Landline | Ridge | Verizon Maryland |
| 301-802- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-291- | Landline | Mount Rainier | Mci Worldcom Communications |
| 301-795- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-713- | Landline | Silver Spring | Verizon Maryland |
| 301-473- | Landline | Frederick | Verizon Maryland |
| 301-427- | Landline | Silver Spring | Verizon Maryland |
| 301-486- | Landline | Greenbelt | Verizon Maryland |
| 301-780- | Landline | Upper Marlboro | Verizon Maryland |
| 301-729- | Landline | Cumberland | Verizon Maryland |
| 301-685- | Landline | Damascus | Teleport Communications America - DC |
| 301-573- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| 301-851- | Landline | Hyattsville | Verizon Maryland |
| 301-926- | Landline | Gaithersburg | Verizon Maryland |
| 301-987- | Landline | Gaithersburg | Verizon Maryland |
| 301-915- | Landline | Bethesda | Starpower Communications |
| 301-758- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-763- | Landline | Suitland | Verizon Maryland |
| 301-295- | Landline | Rockville | Verizon Maryland |
| 301-402- | Landline | Bethesda | Verizon Maryland |
| 301-345- | Landline | Greenbelt | Verizon Maryland |
| 301-887- | Landline | Hyattsville | Verizon Maryland |
| 301-923- | Wireless | Hyattsville | Verizon Maryland |
| 301-215- | Landline | Chevy Chase | Verizon Maryland |
| 301-684- | Landline | Indian Head | Teleport Communications America - DC |
| 301-339- | Landline | Rockville | Cavalier Telephone Mid-atlantic |
| 301-966- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-746- | Landline | Accident | Verizon Maryland |
| 301-918- | Landline | Lanham | Verizon Maryland |
| 301-767- | Landline | Bethesda | Verizon Maryland |
| 301-261- | Landline | Glenn Dale | Verizon Maryland |
| 301-697- | Wireless | Cumberland | New Cingular Wireless PCS - DC |
| 301-331- | Wireless | Hagerstown | New Cingular Wireless PCS - DC |
| 301-367- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-438- | Landline | Rockville | Verizon Maryland |
| 301-298- | Landline | Upper Marlboro | Mcimetro Access Transmission Services LLC |
| 301-274- | Landline | Hughesville | Verizon Maryland |
| 301-305- | Wireless | Frederick | Sprint Spectrum L.p. |
| 301-643- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| 301-572- | Landline | Beltsville | Verizon Maryland |
| 301-229- | Landline | Glen Echo | Verizon Maryland |
| 301-442- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-262- | Landline | Bowie | Verizon Maryland |
| 301-924- | Landline | Ashton | Verizon Maryland |
| 301-370- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| 301-609- | Landline | La Plata | Verizon Maryland |
| 301-300- | Wireless | Bethesda | Cellco Partnership DBA Verizon Wireless |
| 301-594- | Landline | Bethesda | Verizon Maryland |
| 301-248- | Landline | Fort Washington | Verizon Maryland |
| 301-598- | Landline | Rockville | Verizon Maryland |
| 301-476- | Landline | Silver Spring | Verizon Maryland |
| 301-813- | Landline | Bethesda | Baltimore-washington Telephone (bwt) |
| 301-790- | Landline | Hagerstown | Verizon Maryland |
| 301-494- | Landline | Upper Marlboro | Verizon Maryland |
| 301-666- | Landline | Glenn Dale | Teleport Communications America - DC |
| 301-380- | Landline | Rockville | Verizon Maryland |
| 301-831- | Landline | Adamstown | Verizon Maryland |
| 301-979- | Landline | Gaithersburg | Verizon Maryland |
| 301-406- | Wireless | Chevy Chase | Usa Mobility Wireless |
| 301-470- | Landline | Laurel | Verizon Maryland |
| 301-379- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-488- | Wireless | Greenbelt | Verizon Maryland |
| 301-320- | Landline | Glen Echo | Verizon Maryland |
| 301-730- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| 301-205- | Landline | Edgewater | Verizon Maryland |
| 301-921- | Landline | Gaithersburg | Verizon Maryland |
| 301-940- | Wireless | Silver Spring | Verizon Maryland |
| 301-995- | Landline | Patuxent River | Verizon Maryland |
| 301-443- | Landline | Rockville | Verizon Maryland |
| 301-415- | Landline | Silver Spring | Verizon Maryland |
| 301-253- | Landline | Damascus | Verizon Maryland |
| 301-733- | Landline | Hagerstown | Verizon Maryland |
| 301-529- | Wireless | Rockville | New Cingular Wireless PCS - DC |
| 301-613- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-723- | Landline | Cumberland | Verizon Maryland |
| 301-747- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-869- | Landline | Gaithersburg | Verizon Maryland |
| 301-561- | Landline | Silver Spring | Baltimore-washington Telephone (bwt) |
| 301-800- | Wireless | Hagerstown | Virginia PCS Alliance, L.c. |
| 301-281- | Landline | Oxon Hill | Mci Worldcom Communications |
| 301-233- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-991- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| 301-409- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-282- | Landline | Silver Spring | Verizon Maryland |
| 301-481- | Wireless | Leonardtown | Cellco Partnership DBA Verizon Wireless |
| 301-595- | Landline | Beltsville | Verizon Maryland |
| 301-948- | Landline | Gaithersburg | Verizon Maryland |
| 301-876- | Landline | Cumberland | Level 3 Communications |
| 301-803- | Landline | Rockville | Verizon Maryland |
| 301-290- | Landline | Mechanicsville | Verizon Maryland |
| 301-818- | Landline | Waldorf | Verizon Maryland |
| 301-426- | Wireless | Beltsville | Verizon Maryland |
| 301-449- | Landline | Fort Washington | Verizon Maryland |
| 301-852- | Landline | Hyattsville | Verizon Maryland |
| 301-965- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-523- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-782- | Landline | Brandywine | Verizon Maryland |
| 301-270- | Landline | Hyattsville | Verizon Maryland |
| 301-369- | Landline | Laurel | Verizon Maryland |
| 301-714- | Landline | Hagerstown | Verizon Maryland |
| 301-557- | Landline | Mount Rainier | Broadwing Communications. LLC |
| 301-988- | Wireless | Hagerstown | Uscoc Of Cumberland DBA United States Cel Md |
| 301-556- | Landline | Gaithersburg | Teleport Communications America - DC |
| 301-287- | Landline | Rockville | Mci Worldcom Communications |
| 301-825- | Landline | Rockville | AT&T Local |
| 301-775- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-720- | Landline | Brandywine | Teleport Communications America - DC |
| 301-434- | Landline | Hyattsville | Verizon Maryland |
| 301-292- | Landline | Fort Washington | Verizon Maryland |
| 301-590- | Landline | Gaithersburg | Verizon Maryland |
| 301-531- | Landline | Hyattsville | Starpower Communications |
| 301-812- | Landline | North Beach | Verizon Maryland |
| 301-588- | Landline | Silver Spring | Verizon Maryland |
| 301-447- | Landline | Emmitsburg | Verizon Maryland |
| 301-618- | Landline | Hyattsville | Verizon Maryland |
| 301-600- | Landline | Frederick | Verizon Maryland |
| 301-458- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-559- | Landline | Hyattsville | Verizon Maryland |
| 301-355- | Landline | Gaithersburg | Verizon Maryland |
| 301-933- | Landline | Kensington | Verizon Maryland |
| 301-751- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| 301-985- | Landline | Hyattsville | Verizon Maryland |
| 301-501- | Wireless | Oakland | New Cingular Wireless PCS - DC |
| 301-894- | Landline | Temple Hills | Verizon Maryland |
| 301-728- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| 301-899- | Landline | Temple Hills | Verizon Maryland |
| 301-563- | Landline | Silver Spring | Verizon Maryland |
| 301-883- | Landline | Hyattsville | Verizon Maryland |
| 301-284- | Landline | Rockville | Mci Worldcom Communications |
| 301-960- | Landline | Silver Spring | Mcimetro Access Transmission Services LLC |
| 301-502- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-429- | Landline | Lanham | Verizon Maryland |
| 301-833- | Landline | Glenn Dale | Teleport Communications America - DC |
| 301-807- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-254- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-428- | Landline | Gaithersburg | Verizon Maryland |
| 301-957- | Landline | Laurel | Mcimetro Access Transmission Services LLC |
| 301-826- | Landline | Lexington Park | Verizon Maryland |
| 301-745- | Landline | Hagerstown | Verizon Maryland |
| 301-236- | Landline | Silver Spring | Verizon Maryland |
| 301-271- | Landline | Thurmont | Verizon Maryland |
| 301-576- | Landline | Silver Spring | Paetec Communications |
| 301-209- | Landline | Hyattsville | Verizon Maryland |
| 301-702- | Landline | Temple Hills | Verizon Maryland |
| 301-922- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-575- | Landline | Laurel | Us Lec Of Maryland |
| 301-360- | Landline | Frederick | Verizon Maryland |
| 301-534- | Landline | Indian Head | Ymax Communications Corp. |
| 301-828- | Landline | Bethesda | AT&T Local |
| 301-362- | Landline | Laurel | Verizon Maryland |
| 301-260- | Landline | Ashton | Verizon Maryland |
| 301-417- | Landline | Gaithersburg | Verizon Maryland |
| 301-245- | Landline | Bittinger | Verizon Maryland |
| 301-874- | Landline | Adamstown | Verizon Maryland |
| 301-266- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| 301-947- | Landline | Gaithersburg | Verizon Maryland |
| 301-935- | Landline | Hyattsville | Verizon Maryland |
| 301-683- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-867- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-335- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-593- | Landline | Silver Spring | Verizon Maryland |
| 301-676- | Wireless | Frederick | New Cingular Wireless PCS - DC |
| 301-275- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-530- | Landline | Rockville | Verizon Maryland |
| 301-704- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-844- | Wireless | Mount Rainier | Sprint Spectrum L.p. |
| 301-994- | Landline | Valley Lee | Verizon Maryland |
| 301-997- | Landline | Leonardtown | Verizon Maryland |
| 301-393- | Landline | Hagerstown | Verizon Maryland |
| 301-518- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-820- | Landline | Gaithersburg | AT&T Local |
| 301-630- | Landline | Temple Hills | Verizon Maryland |
| 301-562- | Landline | Silver Spring | Verizon Maryland |
| 301-483- | Landline | Laurel | Verizon Maryland |
| 301-834- | Landline | Brunswick | Verizon Maryland |
| 301-675- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| 301-920- | Landline | Washington Zone 3 | RCN Starpower |
| 301-303- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-329- | Wireless | Greenbelt | Cavalier Telephone Mid-atlantic |
| 301-416- | Landline | Williamsport | Verizon Maryland |
| 301-321- | Landline | Rockville | Telcove Operations |
| 301-996- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-839- | Landline | Oxon Hill | Verizon Maryland |
| 301-322- | Landline | Hyattsville | Verizon Maryland |
| 301-471- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| 301-338- | Landline | Cumberland | Idt America Corp |
| 301-560- | Landline | Hyattsville | Paetec Communications |
| 301-395- | Wireless | Laurel | Cellco Partnership DBA Verizon Wireless |
| 301-448- | Landline | Silver Spring | Comcast Phone Of Northern Maryland |
| 301-276- | Landline | Hyattsville | Mci Worldcom Communications |
| 301-654- | Landline | Chevy Chase | Verizon Maryland |
| 301-482- | Landline | Damascus | Verizon Maryland |
| 301-589- | Landline | Silver Spring | Verizon Maryland |
| 301-644- | Landline | Frederick | Verizon Maryland |
| 301-797- | Landline | Hagerstown | Verizon Maryland |
| 301-903- | Landline | Gaithersburg | Verizon Maryland |
| 301-604- | Landline | Laurel | Verizon Maryland |
| 301-221- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-750- | Landline | Friendsville | Core Communications |
| 301-506- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-902- | Landline | Beltsville | Verizon Maryland |
| 301-626- | Wireless | Silver Spring | Verizon Maryland |
| 301-240- | Landline | Gaithersburg | Verizon Maryland |
| 301-971- | Landline | Oxon Hill | Starpower Communications |
| 301-718- | Landline | Chevy Chase | Verizon Maryland |
| 301-934- | Landline | La Plata | Verizon Maryland |
| 301-461- | Wireless | Rockville | Cellco Partnership DBA Verizon Wireless |
| 301-672- | Wireless | Tall Timbers | Sprint Spectrum L.p. |
| 301-696- | Landline | Frederick | Verizon Maryland |
| 301-432- | Landline | Keedysville | Verizon Maryland |
| 301-610- | Landline | Rockville | Verizon Maryland |
| 301-332- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| 301-885- | Landline | Waldorf | Verizon Maryland |
| 301-404- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-472- | Landline | Mechanicsville | Verizon Maryland |
| 301-479- | Landline | College Park | Mci Worldcom Communications |
| 301-478- | Landline | Oldtown | Verizon Maryland |
| 301-972- | Landline | Gaithersburg | Verizon Maryland |
| 301-616- | Wireless | Oakland | Uscoc Of Cumberland DBA United States Cel Md |
| 301-524- | Wireless | Frederick | Sprint Spectrum L.p. |
| 301-606- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| 301-627- | Landline | Upper Marlboro | Verizon Maryland |
| 301-354- | Landline | Rockville | Teleport Communications America - DC |
| 301-249- | Landline | Bowie | Verizon Maryland |
| 301-650- | Landline | Silver Spring | Verizon Maryland |
| 301-238- | Landline | Temple Hills | Verizon Maryland |
| 301-967- | Landline | Suitland | Verizon Maryland |
| 301-755- | Landline | Silver Spring | Mci Worldcom Communications |
| 301-334- | Landline | Oakland | Verizon Maryland |
| 301-603- | Landline | Rockville | Verizon Maryland |
| 301-451- | Landline | Bethesda | Verizon Maryland |
| 301-513- | Landline | Greenbelt | Verizon Maryland |
| 301-203- | Landline | Fort Washington | Verizon Maryland |
| 301-234- | Landline | Fort Washington | Verizon Maryland |
| 301-897- | Landline | Rockville | Verizon Maryland |
| 301-356- | Landline | Laurel | Vdl DBA Global Telecom Brokers |
| 301-545- | Landline | Rockville | Verizon Maryland |
| 301-460- | Landline | Rockville | Verizon Maryland |
| 301-962- | Landline | Kensington | Verizon Maryland |
| 301-913- | Landline | Chevy Chase | Verizon Maryland |
| 301-405- | Landline | Hyattsville | Paetec Communications |
| 301-847- | Landline | Beltsville | Verizon Maryland |
| 301-554- | Wireless | Bethesda | Usa Mobility Wireless |
| 301-671- | Landline | Hagerstown | New Frontiers Telecommunications |
| 301-757- | Landline | Patuxent River | Verizon Maryland |
| 301-838- | Landline | Rockville | Verizon Maryland |
| 301-896- | Landline | Rockville | Verizon Maryland |
| 301-859- | Landline | Oxon Hill | Level 3 Communications |
| 301-621- | Landline | Glenn Dale | Verizon Maryland |
| 301-649- | Landline | Silver Spring | Verizon Maryland |
| 301-279- | Landline | Rockville | Verizon Maryland |
| 301-659- | Wireless | Waldorf | New Cingular Wireless PCS - DC |
| 301-952- | Landline | Upper Marlboro | Verizon Maryland |
| 301-764- | Landline | Waldorf | Verizon Maryland |
| 301-422- | Landline | Hyattsville | Verizon Maryland |
| 301-566- | Wireless | Beltsville | Verizon Maryland |
| 301-939- | Landline | Laurel | Verizon Maryland |
| 301-208- | Landline | Gaithersburg | Verizon Maryland |
| 301-231- | Landline | Rockville | Verizon Maryland |
| 301-285- | Wireless | Silver Spring | Verizon Maryland |
| 301-544- | Wireless | Rockville | Verizon Maryland |
| 301-582- | Landline | Hagerstown | Verizon Maryland |
| 301-363- | Landline | Damascus | Level 3 Communications |
| 301-810- | Landline | Monrovia | AT&T Local |
| 301-512- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-210- | Landline | Beltsville | Verizon Maryland |
| 301-891- | Landline | Hyattsville | Verizon Maryland |
| 301-328- | Landline | Silver Spring | Comcast Phone Of Northern Maryland |
| 301-371- | Landline | Middletown | Verizon Maryland |
| 301-814- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-278- | Landline | Mount Rainier | Mci Worldcom Communications |
| 301-955- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-931- | Landline | Beltsville | Verizon Maryland |
| 301-413- | Landline | Rockville | Verizon Maryland |
| 301-258- | Landline | Gaithersburg | Verizon Maryland |
| 301-399- | Wireless | Waldorf | Sprint Spectrum L.p. |
| 301-949- | Landline | Kensington | Verizon Maryland |
| 301-419- | Landline | Beltsville | Verizon Maryland |
| 301-792- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| 301-687- | Landline | Frostburg | Verizon Maryland |
| 301-454- | Landline | Hyattsville | Verizon Maryland |
| 301-624- | Landline | Frederick | Verizon Maryland |
| 301-375- | Landline | Bryans Road | Verizon Maryland |
| 301-505- | Landline | Temple Hills | Verizon Maryland |
| 301-591- | Landline | Gaithersburg | Paetec Communications |
| 301-956- | Landline | Rockville | Verizon Maryland |
| 301-854- | Landline | Columbia | Verizon Maryland |
| 301-570- | Landline | Ashton | Verizon Maryland |
| 301-645- | Landline | Waldorf | Verizon Maryland |
| 301-299- | Landline | Bethesda | Verizon Maryland |
| 301-251- | Landline | Rockville | Verizon Maryland |
| 301-861- | Landline | Waldorf | Level 3 Communications |
| 301-900- | Landline | Frederick | Verizon Maryland |
| 301-525- | Landline | Gaithersburg | Quantum Telecommunications |
| 301-817- | Landline | Suitland | Verizon Maryland |
| 301-856- | Landline | Clinton | Verizon Maryland |
| 301-574- | Landline | Upper Marlboro | Verizon Maryland |
| 301-581- | Landline | Rockville | Verizon Maryland |
| 301-930- | Wireless | Silver Spring | Verizon Maryland |
| 301-614- | Landline | Greenbelt | Verizon Maryland |
| 301-508- | Wireless | Myersville | New Cingular Wireless PCS - DC |
| 301-326- | Wireless | Silver Spring | Omnipoint Communications Cap Operations |
| 301-707- | Wireless | Cumberland | Uscoc Of Cumberland DBA United States Cel Md |
| 301-788- | Wireless | Frederick | Cellco Partnership DBA Verizon Wireless |
| 301-421- | Landline | Silver Spring | Verizon Maryland |
| 301-424- | Landline | Rockville | Verizon Maryland |
| 301-599- | Landline | Clinton | Verizon Maryland |
| 301-739- | Landline | Hagerstown | Verizon Maryland |
| 301-431- | Landline | Hyattsville | Verizon Maryland |
| 301-288- | Landline | Rockville | Mci Worldcom Communications |
| 301-312- | Wireless | Oxon Hill | New Cingular Wireless PCS - DC |
| 301-350- | Landline | Capitol Heights | Verizon Maryland |
| 301-752- | Wireless | Waldorf | Cellco Partnership DBA Verizon Wireless |
| 301-241- | Landline | Highfield | Verizon Maryland |
| 301-357- | Wireless | Mount Rainier | Cellco Partnership DBA Verizon Wireless |
| 301-744- | Landline | Indian Head | Verizon Maryland |
| 301-686- | Landline | Oxon Hill | Verizon Maryland |
| 301-774- | Landline | Ashton | Verizon Maryland |
| 301-674- | Wireless | Bethesda | Sprint Spectrum L.p. |
| 301-846- | Landline | Frederick | Verizon Maryland |
| 301-946- | Landline | Kensington | Verizon Maryland |
| 301-540- | Landline | Gaithersburg | Verizon Maryland |
| 301-762- | Landline | Rockville | Verizon Maryland |
| 301-498- | Landline | Laurel | Verizon Maryland |
| 301-786- | Landline | Mccoole | Verizon Maryland |
| 301-661- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-943- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-297- | Landline | Fort Washington | Verizon Maryland |
| 301-984- | Landline | Rockville | Verizon Maryland |
| 301-857- | Landline | Clear Spring | Core Communications |
| 301-533- | Landline | Oakland | Verizon Maryland |
| 301-682- | Landline | Frederick | Verizon Maryland |
| 301-773- | Landline | Hyattsville | Verizon Maryland |
| 301-445- | Landline | Hyattsville | Verizon Maryland |
| 301-858- | Landline | Glenn Dale | Verizon Maryland |
| 301-993- | Wireless | Greenbelt | Verizon Maryland |
| 301-400- | Landline | Rockville | Verizon Maryland |
| 301-634- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-970- | Landline | Annapolis | Verizon Maryland |
| 301-787- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-740- | Landline | Gaithersburg | Verizon Maryland |
| 301-868- | Landline | Clinton | Verizon Maryland |
| 301-346- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| 301-364- | Landline | Hyattsville | Mci Worldcom Communications |
| 301-526- | Wireless | Silver Spring | New Cingular Wireless PCS - DC |
| 301-330- | Landline | Gaithersburg | Verizon Maryland |
| 301-974- | Landline | Laurel | Starpower Communications |
| 301-452- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-916- | Landline | Poolesville | Verizon Maryland |
| 301-216- | Landline | Gaithersburg | Verizon Maryland |
| 301-703- | Landline | Mount Airy | Level 3 Communications |
| 301-784- | Landline | Cumberland | Verizon Maryland |
| 301-992- | Wireless | Hagerstown | Sprint Spectrum L.p. |
| 301-391- | Landline | Damascus | Verizon Maryland |
| 301-990- | Landline | Gaithersburg | Verizon Maryland |
| 301-376- | Wireless | Laurel | Verizon Maryland |
| 301-219- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-608- | Landline | Silver Spring | Verizon Maryland |
| 301-850- | Landline | Glenn Dale | Level 3 Communications |
| 301-308- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-736- | Landline | Suitland | Verizon Maryland |
| 301-642- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-520- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-273- | Landline | Silver Spring | Mci Worldcom Communications |
| 301-243- | Landline | Bethesda | Verizon Maryland |
| 301-337- | Landline | Gaithersburg | Mci Worldcom Communications |
| 301-822- | Landline | Mount Rainier | AT&T Local |
| 301-806- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-352- | Landline | Bowie | Verizon Maryland |
| 301-565- | Landline | Silver Spring | Verizon Maryland |
| 301-463- | Landline | Lonaconing | Verizon Maryland |
| 301-612- | Wireless | Sandy Spring | Teleport Communications America |
| 301-567- | Landline | Oxon Hill | Verizon Maryland |
| 301-433- | Landline | Fort Washington | Verizon Maryland |
| 301-794- | Landline | Lanham | Verizon Maryland |
| 301-870- | Landline | Waldorf | Verizon Maryland |
| 301-862- | Landline | Lexington Park | Verizon Maryland |
| 301-499- | Landline | Capitol Heights | Verizon Maryland |
| 301-668- | Landline | Frederick | Verizon Maryland |
| 301-564- | Landline | Rockville | Verizon Maryland |
| 301-342- | Landline | Patuxent River | Verizon Maryland |
| 301-578- | Landline | Silver Spring | Verizon Maryland |
| 301-741- | Landline | Laurel | Level 3 Communications |
| 301-212- | Landline | Gaithersburg | Verizon Maryland |
| 301-880- | Landline | Tall Timbers | Level 3 Communications |
| 301-435- | Landline | Bethesda | Verizon Maryland |
| 301-382- | Wireless | Rockville | Verizon Maryland |
| 301-602- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-734- | Landline | Silver Spring | Verizon Maryland |
| 301-981- | Landline | Mount Rainier | Tw Telecom Of Maryland LLC |
| 301-235- | Landline | Clinton | Mcimetro Access Transmission Services LLC |
| 301-455- | Wireless | Beltsville | Sprint Spectrum L.p. |
| 301-468- | Landline | Rockville | Verizon Maryland |
| 301-646- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-333- | Landline | Capitol Heights | Verizon Maryland |
| 301-441- | Landline | Greenbelt | Verizon Maryland |
| 301-232- | Landline | Sandy Spring | Mci Worldcom Communications |
| 301-265- | Landline | Fort Washington | Verizon Maryland |
| 301-771- | Wireless | Chevy Chase | Verizon Maryland |
| 301-695- | Landline | Frederick | Verizon Maryland |
| 301-489- | Landline | Greenbelt | Verizon Maryland |
| 301-942- | Landline | Kensington | Verizon Maryland |
| 301-336- | Landline | Capitol Heights | Verizon Maryland |
| 301-464- | Landline | Bowie | Verizon Maryland |
| 301-358- | Landline | Upper Marlboro | Level 3 Communications |
| 301-678- | Landline | Hancock | Verizon Maryland |
| 301-286- | Landline | Greenbelt | Verizon Maryland |
| 301-670- | Landline | Gaithersburg | Verizon Maryland |
| 301-507- | Landline | Greenbelt | Verizon Maryland |
| 301-414- | Landline | Damascus | Verizon Maryland |
| 301-888- | Landline | Brandywine | Verizon Maryland |
| 301-263- | Landline | Glen Echo | Verizon Maryland |
| 301-571- | Landline | Rockville | Verizon Maryland |
| 301-569- | Wireless | Gaithersburg | Cellco Partnership DBA Verizon Wireless |
| 301-310- | Landline | Columbia | Verizon Maryland |
| 301-398- | Landline | Rockville | Verizon Maryland |
| 301-648- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-366- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| 301-837- | Landline | Hyattsville | Mcimetro Access Transmission Services LLC |
| 301-910- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-250- | Landline | Rockville | Mci Worldcom Communications |
| 301-552- | Landline | Lanham | Verizon Maryland |
| 301-805- | Landline | Bowie | Verizon Maryland |
| 301-629- | Wireless | Glenn Dale | Verizon Maryland |
| 301-325- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-252- | Wireless | Gaithersburg | Sprint Spectrum L.p. |
| 301-517- | Landline | Rockville | Verizon Maryland |
| 301-925- | Landline | Hyattsville | Verizon Maryland |
| 301-347- | Landline | Chevy Chase | Verizon Maryland |
| 301-873- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-316- | Landline | Temple Hills | Verizon Maryland |
| 301-632- | Landline | Waldorf | Verizon Maryland |
| 301-378- | Landline | Frederick | Comcast Phone Of Northern Maryland |
| 301-541- | Landline | Mount Rainier | Teleport Communications America - DC |
| 301-543- | Landline | Laurel | Teleport Communications America - DC |
| 301-527- | Landline | Gaithersburg | Verizon Maryland |
| 301-953- | Landline | Laurel | Verizon Maryland |
| 301-607- | Landline | New Market | Verizon Maryland |
| 301-860- | Landline | Bowie | Verizon Maryland |
| 301-742- | Wireless | Bethesda | New Cingular Wireless PCS - DC |
| 301-641- | Wireless | Silver Spring | Cellco Partnership DBA Verizon Wireless |
| 301-840- | Landline | Gaithersburg | Verizon Maryland |
| 301-485- | Landline | Oxon Hill | Comcast Phone Of Northern Maryland |
| 301-849- | Landline | Oakland | New Frontiers Telecommunications |
| 301-830- | Landline | Silver Spring | AT&T Local |
| 301-510- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-389- | Landline | Laurel | Tw Telecom Of Maryland LLC |
| 301-521- | Landline | Oxon Hill | Verizon Maryland |
| 301-660- | Wireless | Keedysville | New Cingular Wireless PCS - DC |
| 301-217- | Landline | Rockville | Verizon Maryland |
| 301-401- | Wireless | Frederick | New Cingular Wireless PCS - DC |
| 301-664- | Landline | Chevy Chase | Verizon Maryland |
| 301-798- | Landline | New Market | Verizon Maryland |
| 301-268- | Wireless | Cumberland | Uscoc Of Cumberland DBA United States Cel Md |
| 301-302- | Landline | Hagerstown | Sprint Spectrum L.p. |
| 301-207- | Wireless | Greenbelt | Usa Mobility Wireless |
| 301-737- | Landline | Lexington Park | Verizon Maryland |
| 301-907- | Landline | Chevy Chase | Verizon Maryland |
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