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% |
| New Cingular Wireless Pcs Llc Dc | Wireless | 3% |
| Cellco Partnership Dba Verizon Wireless Md | Wireless | 3% |
| Mcimetro Access Transmission Services Llc | Landline | 2% |
| Sprint Spectrum L P | Wireless | 2% |
| Teleport Communications America Llc Md | Landline | 2% |
| Tw Telecom Of Maryland Llc Md | Landline | 1% |
| Usa Mobility Wireless Inc | Wireless | 1% |
| Cavalier Telephone Mid Atlantic Llc Md | Landline | < 1% |
| Broadview Networks Inc Md | Wireless | < 1% |
| Mcc Telephony Of The Mid Atlantic Llc Md | Landline | < 1% |
| Bandwidth Com Clec Llc Md | Wireless | < 1% |
| Lightwave Communications Llc Md | Landline | < 1% |
| Peerless Network Of Maryland Llc | Landline | < 1% |
| Cavalier Telephone Llc Mid Atlantic Md | Landline | < 1% |
| Comcast Phone Of Northern Maryland Inc Md | Landline | < 1% |
| Atx Telecommunications Services Ltd | Landline | < 1% |
| At T Local | Landline | < 1% |
| Ctc Communications Corp Md | Landline | < 1% |
| Halo Wireless Services Inc | Wireless | < 1% |
| Quantum Telecommunications Inc Md | Landline | < 1% |
| Sprint Spectrum L P Md | Wireless | < 1% |
| Paetec Communications Inc Md | Landline | < 1% |
| Omnipoint Communications Cap Operations Llc | Wireless | < 1% |
| Level 3 Communications Llc Md | Landline | < 1% |
| Core Communications Inc Md | Wireless | < 1% |
| Baltimore Washington Telephone Bwt | Landline | < 1% |
| Mci Worldcom Communications Inc Md | Landline | < 1% |
| Armstrong Telephone Co Of Maryland | Landline | < 1% |
| Aquis Communications Inc | Wireless | < 1% |
| Idt America Corp Md | Wireless | < 1% |
| Redi Call Communications Co | Wireless | < 1% |
| Sprint Communications Company L P Md | Landline | < 1% |
| Armstrong Telecommunications Inc Md | Wireless | < 1% |
Prefixes
| Prefix | City | Carrier | Type |
|---|---|---|---|
| Mardela Springs | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| North East | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Madison | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Butler | Verizon Maryland, Inc. | Landline | |
| Crofton | Verizon Maryland, Inc. | Landline | |
| Neavitt | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Silver Spring | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Pocomoke City | Verizon Maryland, Inc. | Landline | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Essex | Sprint Spectrum L.p. | Wireless | |
| Pasadena | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| New Windsor | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Fulton | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Tracys Landing | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| North Beach | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Mount Airy | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Rock Hall | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Showell | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Glyndon | Mcimetro Access Transmission Services Llc | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Federalsburg | Verizon Maryland, Inc. | Landline | |
| Federalsburg | Verizon Maryland, Inc. | Landline | |
| Trappe | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Teleport Communications America, Llc - Md | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Galesville | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Darlington | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Bel Air | Mcimetro Access Transmission Services Llc | Landline | |
| Hunt Valley | Mcimetro Access Transmission Services Llc | Landline | |
| Cordova | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hampstead | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Port Deposit | Verizon Maryland, Inc. | Landline | |
| Silver Spring | Usa Mobility Wireless, Inc. | Wireless | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Crumpton | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Chestertown | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Silver Spring | Verizon Maryland, Inc. | Landline | |
| Stevensville | Sprint Spectrum L.p. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Queenstown | Verizon Maryland, Inc. | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Sudlersville | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Sprint Spectrum L.p. | Wireless | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Annapolis Junction | Baltimore-washington Telephone Bwt | Landline | |
| Severna Park | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Delmar | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| New Windsor | Verizon Maryland, Inc. | Landline | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Preston | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Easton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baldwin | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glenwood | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Laurel | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Cambridge | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Nottingham | Sprint Spectrum L.p. | Wireless | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Huntingtown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Sykesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Church Hill | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Cockeysville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Earleville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Parkville | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Cambridge | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Cambridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Galena | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Churchville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hebron | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Teleport Communications America, Llc - Md | Landline | |
| Sparrows Point | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Darlington | Verizon Maryland, Inc. | Landline | |
| Butler | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| North East | Armstrong Telephone Co. of Maryland | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Fruitland | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Berlin | Sprint Communications Company, L.p. - Md | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Whiteford | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Tw Telecom of Maryland Llc - Md | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Lusby | Usa Mobility Wireless, Inc. | Wireless | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| East New Market | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Cecilton | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Stockton | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Tw Telecom of Maryland Llc - Md | Landline | |
| Sykesville | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Rock Hall | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Queenstown | At&t Local | Landline | |
| Parkton | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Hanover | Teleport Communications America, Llc - Md | Landline | |
| Churchville | Verizon Maryland, Inc. | Landline | |
| Easton | Level 3 Communications, Llc - Md | Landline | |
| Halethorpe | Usa Mobility Wireless, Inc. | Wireless | |
| Fallston | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Severn | Sprint Spectrum L.p. | Wireless | |
| Glenelg | Verizon Maryland, Inc. | Landline | |
| Federalsburg | Verizon Maryland, Inc. | Landline | |
| Jarrettsville | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Secretary | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Salisbury | Idt America Corp - Md | Wireless | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Crapo | Verizon Maryland, Inc. | Landline | |
| Kingsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Manchester | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Rising Sun | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Belcamp | Verizon Maryland, Inc. | Landline | |
| Baltimore | Landline | ||
| Windsor Mill | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| West River | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Delmar | Verizon Maryland, Inc. | Landline | |
| Clarksville | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Mcimetro Access Transmission Services Llc | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Broadview Networks, Inc. - Md | Wireless | |
| Still Pond | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Gwynn Oak | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Centreville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Hillsboro | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Cockeysville | Teleport Communications America, Llc - Md | Landline | |
| North East | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Churchville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Hanover | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Princess Anne | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Towson | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Laurel | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Broomes Island | Verizon Maryland, Inc. | Landline | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Crofton | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mci Worldcom Communications, Inc. - Md | Landline | |
| Fork | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Barclay | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Taylors Island | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| North East | Usa Mobility Wireless, Inc. | Wireless | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Chase | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Mcimetro Access Transmission Services Llc | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcc Telephony of the Mid-atlantic, Llc - Md | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Glen Burnie | Mcimetro Access Transmission Services Llc | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Curtis Bay | Verizon Maryland, Inc. | Wireless | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| New Windsor | Verizon Maryland, Inc. | Landline | |
| Tracys Landing | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Mardela Springs | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Arnold | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Core Communications, Inc. - Md | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glenwood | Sprint Spectrum L.p. | Wireless | |
| Queen Anne | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Atx Telecommunications Services, Ltd | Landline | |
| Catonsville | Mcimetro Access Transmission Services Llc | Landline | |
| Rosedale | Sprint Spectrum L.p. | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Westover | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Stevensville | Verizon Maryland, Inc. | Landline | |
| Easton | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Halo Wireless Services, Inc. | Wireless | |
| Pikesville | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Dowell | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Crisfield | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Glen Burnie | Usa Mobility Wireless, Inc. | Wireless | |
| Keymar | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Edgewood | Mcimetro Access Transmission Services Llc | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Denton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Deal Island | Verizon Maryland, Inc. | Landline | |
| Pikesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Upper Falls | Verizon Maryland, Inc. | Wireless | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| North East | Verizon Maryland, Inc. | Landline | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Usa Mobility Wireless, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Bivalve | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| White Hall | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Essex | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Galena | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Chesapeake Beach | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Usa Mobility Wireless, Inc. | Wireless | |
| Chesapeake City | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Usa Mobility Wireless, Inc. | Wireless | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Tylerton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Salisbury | Aquis Communications, Inc. | Wireless | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Denton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Fork | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Towson | Mcimetro Access Transmission Services Llc | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Crofton | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Wireless | |
| Baltimore | Ctc Communications Corp. - Md | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sherwood | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Churchville | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Chesapeake Beach | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Landline | ||
| White Marsh | Sprint Spectrum L.p. | Wireless | |
| Millersville | Mcimetro Access Transmission Services Llc | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Hyattsville | Landline | ||
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rockville | Verizon Maryland, Inc. | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Church Hill | Sprint Spectrum L.p. | Wireless | |
| Pikesville | Bandwidth.com Clec, Llc - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Lightwave Communications, Llc - Md | Landline | |
| Trappe | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Chestertown | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hyattsville | Tw Telecom of Maryland Llc - Md | Landline | |
| Elkridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Redi-call Communications Co | Wireless | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Sykesville | Sprint Spectrum L.p. - Md | Wireless | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Solomons | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Brooklyn | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Omnipoint Communications Cap Operations, Llc | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Severna Park | Armstrong Telecommunications, Inc. - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| East New Market | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Oxford | Verizon Maryland, Inc. | Landline | |
| Annapolis | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Queenstown | Idt America Corp - Md | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Level 3 Communications, Llc - Md | Landline | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Abingdon | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Bel Air | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Baltimore | Peerless Network of Maryland, Llc | Landline | |
| Edgewood | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Chester | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Mci Worldcom Communications, Inc. - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lanham | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Finksburg | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Salisbury | Mci Worldcom Communications, Inc. - Md | Wireless | |
| Annapolis | Paetec Communications, Inc. - Md | Landline | |
| Crofton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Quantum Telecommunications, Inc. - Md | Landline | |
| Severna Park | Mcimetro Access Transmission Services Llc | Landline | |
| Annapolis | Teleport Communications America, Llc - Md | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hunt Valley | Bandwidth.com Clec, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Owings Mills | Mci Worldcom Communications, Inc. - Md | Landline | |
| Salisbury | Level 3 Communications, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Pikesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Severna Park | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Catonsville | Cellco Partnership Dba Verizon Wireless - Md | Wireless |