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 |
|---|---|
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| |
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% |
| New Cingular Wireless Pcs Llc Dc | Wireless | 3% |
| Cellco Partnership Dba Verizon Wireless Md | Wireless | 3% |
| Sprint Spectrum L P | Wireless | 2% |
| Mcimetro Access Transmission Services Llc | Landline | 2% |
| Teleport Communications America Llc Md | Landline | 2% |
| Usa Mobility Wireless Inc | Wireless | 1% |
| Tw Telecom Of Maryland Llc Md | Landline | 1% |
| Comcast Phone Of Northern Maryland Inc Md | Landline | < 1% |
| Sprint Communications Company L P Md | Landline | < 1% |
| Aquis Communications Inc | Wireless | < 1% |
| Peerless Network Of Maryland Llc | Landline | < 1% |
| Mci Worldcom Communications Inc Md | Landline | < 1% |
| Baltimore Washington Telephone Bwt | Landline | < 1% |
| Lightwave Communications Llc Md | Landline | < 1% |
| Redi Call Communications Co | Wireless | < 1% |
| Broadview Networks Inc Md | Wireless | < 1% |
| Cavalier Telephone Llc Mid Atlantic Md | Landline | < 1% |
| Bandwidth Com Clec Llc Md | Landline | < 1% |
| Paetec Communications Inc Md | Landline | < 1% |
| Core Communications Inc Md | Wireless | < 1% |
| Quantum Telecommunications Inc Md | Landline | < 1% |
| Armstrong Telephone Co Of Maryland | Landline | < 1% |
| Mcc Telephony Of The Mid Atlantic Llc Md | Landline | < 1% |
| At T Local | Landline | < 1% |
| Level 3 Communications Llc Md | Landline | < 1% |
| Armstrong Telecommunications Inc Md | Wireless | < 1% |
| Halo Wireless Services Inc | Wireless | < 1% |
| Cavalier Telephone Mid Atlantic Llc Md | Landline | < 1% |
| Idt America Corp Md | Wireless | < 1% |
| Atx Telecommunications Services Ltd | Landline | < 1% |
| Sprint Spectrum L P Md | Wireless | < 1% |
| Omnipoint Communications Cap Operations Llc | Wireless | < 1% |
| Ctc Communications Corp Md | Landline | < 1% |
Prefixes
| Prefix | City | Carrier | Type |
|---|---|---|---|
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Upper Falls | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Westover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Stevensville | Sprint Spectrum L.p. | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Centreville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Baltimore | Quantum Telecommunications, Inc. - Md | Landline | |
| Charlestown | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sparrows Point | Verizon Maryland, Inc. | Landline | |
| Westover | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Cordova | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Savage | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Kingsville | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Ctc Communications Corp. - Md | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Prince Frederick | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Easton | Level 3 Communications, Llc - Md | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Wittman | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Lanham | Verizon Maryland, Inc. | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Glenelg | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Lusby | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Hebron | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Worton | Sprint Spectrum L.p. | Wireless | |
| Crocheron | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Pikesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Mcimetro Access Transmission Services Llc | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| East New Market | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Parkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Whiteford | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Jessup | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Pittsville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Laurel | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Fork | Teleport Communications America, Llc - Md | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Chesapeake City | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Nottingham | Sprint Spectrum L.p. | Wireless | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Prince Frederick | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Linkwood | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Fork | Mcimetro Access Transmission Services Llc | Landline | |
| Rockville | Verizon Maryland, Inc. | Wireless | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Mcimetro Access Transmission Services Llc | Landline | |
| Girdletree | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Salisbury | Mci Worldcom Communications, Inc. - Md | Wireless | |
| Catonsville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Chestertown | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Berlin | Sprint Communications Company, L.p. - Md | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Denton | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Grasonville | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hebron | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Kennedyville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Saint Leonard | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Pylesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Upperco | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fort George G Meade | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Showell | Verizon Maryland, Inc. | Landline | |
| Baltimore | Landline | ||
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Usa Mobility Wireless, Inc. | Wireless | |
| Towson | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Keymar | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Saint Leonard | Verizon Maryland, Inc. | Landline | |
| Warwick | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Galena | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Perryville | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Teleport Communications America, Llc - Md | Landline | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| White Hall | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Pikesville | Teleport Communications America, Llc - Md | Landline | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Atx Telecommunications Services, Ltd | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sherwood | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Mount Airy | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glyndon | Mcimetro Access Transmission Services Llc | Landline | |
| Baldwin | Verizon Maryland, Inc. | Landline | |
| Parkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pylesville | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Trappe | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Kennedyville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Laurel | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Conowingo | Armstrong Telephone Co. of Maryland | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Teleport Communications America, Llc - Md | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Belcamp | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Crownsville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Millersville | Mcimetro Access Transmission Services Llc | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Salisbury | Level 3 Communications, Llc - Md | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Salisbury | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Edgewater | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| North East | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Peerless Network of Maryland, Llc | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Port Deposit | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Verizon Maryland, Inc. | Landline | |
| Finksburg | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Queenstown | At&t Local | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Cambridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Woodbine | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Deale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Lightwave Communications, Llc - Md | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Silver Spring | Usa Mobility Wireless, Inc. | Wireless | |
| Hyattsville | Tw Telecom of Maryland Llc - Md | Landline | |
| Odenton | Mcimetro Access Transmission Services Llc | Landline | |
| Glen Arm | Verizon Maryland, Inc. | Landline | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Delmar | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Salisbury | Usa Mobility Wireless, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Easton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Trappe | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Mcimetro Access Transmission Services Llc | Landline | |
| Severn | Sprint Spectrum L.p. | Wireless | |
| New Windsor | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Essex | Usa Mobility Wireless, Inc. | Wireless | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Bel Air | Mcimetro Access Transmission Services Llc | Landline | |
| Millington | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Easton | Verizon Maryland, Inc. | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Trappe | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Millersville | Sprint Spectrum L.p. | Wireless | |
| Stevenson | Verizon Maryland, Inc. | Landline | |
| Deal Island | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Chesapeake City | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Galena | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Annapolis Junction | Baltimore-washington Telephone Bwt | Landline | |
| Marriottsville | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Marydel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Redi-call Communications Co | Wireless | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Omnipoint Communications Cap Operations, Llc | Wireless | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Fruitland | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Stevensville | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Church Hill | Verizon Maryland, Inc. | Landline | |
| Upper Falls | Verizon Maryland, Inc. | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Crofton | Verizon Maryland, Inc. | Landline | |
| Lusby | Usa Mobility Wireless, Inc. | Wireless | |
| Linkwood | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Cordova | Verizon Maryland, Inc. | Landline | |
| Salisbury | Sprint Spectrum L.p. | Wireless | |
| Churchville | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Chestertown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcc Telephony of the Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Denton | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Tw Telecom of Maryland Llc - Md | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Darlington | Verizon Maryland, Inc. | Landline | |
| Lanham | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Tylerton | Verizon Maryland, Inc. | Landline | |
| Sykesville | Sprint Spectrum L.p. - Md | Wireless | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Pylesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Henderson | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Bandwidth.com Clec, Llc - Md | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Landline | ||
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Arnold | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Salisbury | Idt America Corp - Md | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glenwood | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fruitland | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Ellicott City | Mcimetro Access Transmission Services Llc | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Fort George G Meade | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| New Windsor | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Quantico | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Pikesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| West River | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Elkridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Cockeysville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Pikesville | Tw Telecom of Maryland Llc - Md | Landline | |
| Owings Mills | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Dowell | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Tw Telecom of Maryland Llc - Md | Landline | |
| Ellicott City | Usa Mobility Wireless, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Salisbury | Aquis Communications, Inc. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Owings Mills | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Union Bridge | Halo Wireless Services, Inc. | Wireless | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Paetec Communications, Inc. - Md | Landline | |
| Windsor Mill | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Linthicum Heights | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Stevensville | Verizon Maryland, Inc. | Landline | |
| North East | Usa Mobility Wireless, Inc. | Wireless | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Chesapeake City | Verizon Maryland, Inc. | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Centreville | Sprint Spectrum L.p. | Wireless | |
| Queenstown | Idt America Corp - Md | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Church Creek | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Broadview Networks, Inc. - Md | Wireless | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Level 3 Communications, Llc - Md | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Bandwidth.com Clec, Llc - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Crofton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Glen Burnie | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Finksburg | Mcimetro Access Transmission Services Llc | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Bel Air | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Cambridge | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewood | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Oxford | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Easton | Sprint Spectrum L.p. | Wireless | |
| White Marsh | Sprint Spectrum L.p. | Wireless | |
| Annapolis | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Parkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Easton | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Churchville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Rock Hall | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Severna Park | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Wireless | |
| Denton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| East New Market | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Catonsville | Mcimetro Access Transmission Services Llc | Landline | |
| Tracys Landing | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hurlock | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Crofton | Mcimetro Access Transmission Services Llc | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Gwynn Oak | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Hyattsville | Landline | ||
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Severna Park | Armstrong Telecommunications, Inc. - Md | Wireless | |
| Preston | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fallston | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Severna Park | Mcimetro Access Transmission Services Llc | Landline | |
| Hanover | Teleport Communications America, Llc - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Huntingtown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hunt Valley | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewood | Mcimetro Access Transmission Services Llc | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Core Communications, Inc. - Md | Wireless |