410 Area Code in Maryland, United States
Description
Area code 410 covers much of eastern Maryland, including Baltimore, Annapolis, and the Eastern Shore. It was created in 1991 from a split of the original 301 area code, and in 1997, overlay code 443 was introduced, followed by 667 in 2012. The 410 region includes major historical and cultural landmarks, including the U.S. Naval Academy, Inner Harbor, and Johns Hopkins University. It serves a population dense with government, healthcare, and port-related industries. Despite the overlays, 410 remains the most iconic and recognizable area code in Maryland. It is frequently used in music, business names, and as a symbol of Baltimore pride.
Time & Time Zone
Time zone:
Eastern (GMT -05:00) Current time:
Map
Major Cities
| City | Prefixes |
|---|---|
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Counties
| County | Prefixes |
|---|---|
| Baltimore City | |
| Baltimore | |
| Anne Arundel | |
| Howard | |
| Harford | |
| Carroll | |
| Wicomico | |
| Worcester | |
| Prince Georges | |
| Cecil | |
| Queen Annes | |
| Talbot | |
| Caroline | |
| Dorchester | |
| Calvert | |
| Kent | |
| Frederick | |
| Somerset | |
| Montgomery |
Telephone Carriers
| Carrier | Type | Prefixes (%) |
|---|---|---|
| Verizon Maryland Inc | Landline | 83% |
| Cellco Partnership Dba Verizon Wireless Md | Wireless | 3% |
| New Cingular Wireless Pcs Llc Dc | Wireless | 3% |
| Teleport Communications America Llc Md | Landline | 2% |
| Mcimetro Access Transmission Services Llc | Landline | 2% |
| Sprint Spectrum L P | Wireless | 2% |
| Usa Mobility Wireless Inc | Wireless | 1% |
| Tw Telecom Of Maryland Llc Md | Landline | 1% |
| Omnipoint Communications Cap Operations Llc | Wireless | < 1% |
| Cavalier Telephone Llc Mid Atlantic Md | Landline | < 1% |
| Lightwave Communications Llc Md | Landline | < 1% |
| Armstrong Telephone Co Of Maryland | Landline | < 1% |
| Level 3 Communications Llc Md | Landline | < 1% |
| Atx Telecommunications Services Ltd | Landline | < 1% |
| Mci Worldcom Communications Inc Md | Landline | < 1% |
| Bandwidth Com Clec Llc Md | Landline | < 1% |
| Idt America Corp Md | Wireless | < 1% |
| Comcast Phone Of Northern Maryland Inc Md | Landline | < 1% |
| Sprint Communications Company L P Md | Landline | < 1% |
| Armstrong Telecommunications Inc Md | Wireless | < 1% |
| Peerless Network Of Maryland Llc | Landline | < 1% |
| At T Local | Landline | < 1% |
| Aquis Communications Inc | Wireless | < 1% |
| Redi Call Communications Co | Wireless | < 1% |
| Paetec Communications Inc Md | Landline | < 1% |
| Ctc Communications Corp Md | Landline | < 1% |
| Mcc Telephony Of The Mid Atlantic Llc Md | Landline | < 1% |
| Cavalier Telephone Mid Atlantic Llc Md | Landline | < 1% |
| Broadview Networks Inc Md | Wireless | < 1% |
| Halo Wireless Services Inc | Wireless | < 1% |
| Quantum Telecommunications Inc Md | Landline | < 1% |
| Baltimore Washington Telephone Bwt | Landline | < 1% |
| Sprint Spectrum L P Md | Wireless | < 1% |
| Core Communications Inc Md | Wireless | < 1% |
Prefixes
| Prefix | City | Carrier | Type |
|---|---|---|---|
| Church Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ridgely | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Baldwin | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Trappe | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Snow Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hyattsville | Landline | ||
| Eden | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Manchester | Verizon Maryland, Inc. | Landline | |
| Pylesville | Verizon Maryland, Inc. | Landline | |
| Highland | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Brooklyn | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Tw Telecom of Maryland Llc - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Teleport Communications America, Llc - Md | Landline | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Jessup | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Grasonville | Verizon Maryland, Inc. | Landline | |
| Whiteford | Verizon Maryland, Inc. | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Mcimetro Access Transmission Services Llc | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Dowell | Verizon Maryland, Inc. | Landline | |
| Edgewater | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Linkwood | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Port Deposit | Verizon Maryland, Inc. | Landline | |
| Trappe | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Warwick | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Taylors Island | Verizon Maryland, Inc. | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Dayton | Verizon Maryland, Inc. | Landline | |
| Quantico | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Dundalk | Teleport Communications America, Llc - Md | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Newcomb | Verizon Maryland, Inc. | Landline | |
| Stevenson | Verizon Maryland, Inc. | Landline | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sykesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Peerless Network of Maryland, Llc | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Chestertown | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Crisfield | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Upper Fairmount | Verizon Maryland, Inc. | Landline | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Ridgely | Verizon Maryland, Inc. | Landline | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Denton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Bethlehem | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Kingsville | Verizon Maryland, Inc. | Landline | |
| Severna Park | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Worton | Sprint Spectrum L.p. | Wireless | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Westover | Verizon Maryland, Inc. | Landline | |
| Towson | Teleport Communications America, Llc - Md | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Churchville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Centreville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Woodsboro | Verizon Maryland, Inc. | Landline | |
| Annapolis | Sprint Spectrum L.p. | Wireless | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Wingate | Verizon Maryland, Inc. | Landline | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| East New Market | Verizon Maryland, Inc. | Landline | |
| Lusby | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Tw Telecom of Maryland Llc - Md | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| East New Market | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Still Pond | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Stevensville | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Idt America Corp - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Darlington | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Curtis Bay | Tw Telecom of Maryland Llc - Md | Landline | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gambrills | Sprint Spectrum L.p. | Wireless | |
| Preston | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Galena | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Rock Hall | Verizon Maryland, Inc. | Landline | |
| Church Hill | Verizon Maryland, Inc. | Landline | |
| Solomons | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Rosedale | Sprint Spectrum L.p. | Wireless | |
| Greensboro | Verizon Maryland, Inc. | Landline | |
| Rising Sun | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Stevenson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Chase | Verizon Maryland, Inc. | Landline | |
| White Hall | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Millington | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Port Republic | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hebron | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Towson | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Powellville | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Whiteford | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Parkville | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Level 3 Communications, Llc - Md | Landline | |
| Freeland | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Butler | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Omnipoint Communications Cap Operations, Llc | Wireless | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Bishopville | Verizon Maryland, Inc. | Landline | |
| Hebron | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Savage | Baltimore-washington Telephone Bwt | Landline | |
| Edgewood | Teleport Communications America, Llc - Md | Landline | |
| Owings Mills | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Towson | Mcimetro Access Transmission Services Llc | Landline | |
| Glenn Dale | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| White Marsh | Sprint Spectrum L.p. | Wireless | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Whaleyville | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Parkton | Verizon Maryland, Inc. | Landline | |
| Street | Verizon Maryland, Inc. | Landline | |
| Greensboro | Verizon Maryland, Inc. | Landline | |
| Chester | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Landline | ||
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Gunpowder | Verizon Maryland, Inc. | Landline | |
| Darlington | Verizon Maryland, Inc. | Landline | |
| Tilghman | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Baltimore | Ctc Communications Corp. - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Salisbury | Mci Worldcom Communications, Inc. - Md | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Finksburg | Mcimetro Access Transmission Services Llc | Landline | |
| Queen Anne | At&t Local | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Essex | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Arnold | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Fruitland | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Salisbury | Aquis Communications, Inc. | Wireless | |
| Millington | Verizon Maryland, Inc. | Landline | |
| Belcamp | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Lusby | Usa Mobility Wireless, Inc. | Wireless | |
| Fulton | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Crofton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Easton | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Centreville | Sprint Spectrum L.p. | Wireless | |
| Catonsville | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Millersville | Mcimetro Access Transmission Services Llc | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Essex | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Fort Howard | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Wireless | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mci Worldcom Communications, Inc. - Md | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Wireless | |
| Lanham | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Colora | Armstrong Telephone Co. of Maryland | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Perryville | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Rockville | Verizon Maryland, Inc. | Wireless | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Kingsville | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lutherville Timonium | Mcimetro Access Transmission Services Llc | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Union Bridge | Halo Wireless Services, Inc. | Wireless | |
| Upper Falls | Verizon Maryland, Inc. | Wireless | |
| Pikesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Perry Hall | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pylesville | Verizon Maryland, Inc. | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Landline | ||
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Rising Sun | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Chestertown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| North East | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Severna Park | Mcimetro Access Transmission Services Llc | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Perry Point | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Prince Frederick | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Fort George G Meade | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Bandwidth.com Clec, Llc - Md | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Ewell | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Gibson Island | Verizon Maryland, Inc. | Landline | |
| Salisbury | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Annapolis | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Severna Park | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hyattsville | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| East New Market | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Chesapeake City | Verizon Maryland, Inc. | Landline | |
| Salisbury | Level 3 Communications, Llc - Md | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Core Communications, Inc. - Md | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Cambridge | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Kennedyville | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Nottingham | Sprint Spectrum L.p. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Glen Burnie | Usa Mobility Wireless, Inc. | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Pasadena | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Crofton | Mcimetro Access Transmission Services Llc | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Chesapeake Beach | Verizon Maryland, Inc. | Landline | |
| Deal Island | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Glyndon | Mcimetro Access Transmission Services Llc | Landline | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Salisbury | Usa Mobility Wireless, Inc. | Wireless | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Pikesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| West River | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Churchville | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Pikesville | Teleport Communications America, Llc - Md | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Severna Park | Armstrong Telecommunications, Inc. - Md | Wireless | |
| Chesapeake Beach | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcc Telephony of the Mid-atlantic, Llc - Md | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fork | Mcimetro Access Transmission Services Llc | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Owings Mills | Mci Worldcom Communications, Inc. - Md | Landline | |
| Chesapeake City | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Oxford | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Halethorpe | Broadview Networks, Inc. - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | Mcimetro Access Transmission Services Llc | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Windsor Mill | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Hanover | Teleport Communications America, Llc - Md | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Laurel | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Wireless | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Catonsville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Bandwidth.com Clec, Llc - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Cambridge | Verizon Maryland, Inc. | Landline | |
| Annapolis | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Paetec Communications, Inc. - Md | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Queenstown | Idt America Corp - Md | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Annapolis | Atx Telecommunications Services, Ltd | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Silver Spring | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Quantum Telecommunications, Inc. - Md | Landline | |
| Easton | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Huntingtown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Laurel | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Level 3 Communications, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Parkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Redi-call Communications Co | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Sykesville | Sprint Spectrum L.p. - Md | Wireless | |
| Ellicott City | Usa Mobility Wireless, Inc. | Landline | |
| Halethorpe | Lightwave Communications, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Centreville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Denton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Gwynn Oak | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Cambridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Berlin | Sprint Communications Company, L.p. - Md | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hurlock | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Elkridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Edgewood | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Sprint Spectrum L.p. | Wireless | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fork | Teleport Communications America, Llc - Md | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| North East | Usa Mobility Wireless, Inc. | Wireless | |
| Fallston | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Sprint Spectrum L.p. | Wireless |