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 | |
| Caroline | |
| Talbot | |
| Dorchester | |
| Calvert | |
| Kent | |
| Frederick | |
| Somerset | |
| Montgomery |
Telephone Carriers
| Carrier | Type | Prefixes (%) |
|---|---|---|
| Verizon Maryland Inc | Landline | 83% |
| Cellco Partnership Dba Verizon Wireless Md | Wireless | 3% |
| New Cingular Wireless Pcs Llc Dc | Wireless | 3% |
| Mcimetro Access Transmission Services Llc | Landline | 2% |
| Teleport Communications America Llc Md | Landline | 2% |
| Sprint Spectrum L P | Wireless | 2% |
| Usa Mobility Wireless Inc | Wireless | 1% |
| Tw Telecom Of Maryland Llc Md | Landline | 1% |
| Peerless Network Of Maryland Llc | Landline | < 1% |
| Idt America Corp Md | Wireless | < 1% |
| Core Communications Inc Md | Wireless | < 1% |
| Comcast Phone Of Northern Maryland Inc Md | Landline | < 1% |
| Cavalier Telephone Mid Atlantic Llc Md | Landline | < 1% |
| Aquis Communications Inc | Wireless | < 1% |
| Lightwave Communications Llc Md | Landline | < 1% |
| Sprint Communications Company L P Md | Landline | < 1% |
| Bandwidth Com Clec Llc Md | Wireless | < 1% |
| Armstrong Telecommunications Inc Md | Wireless | < 1% |
| Ctc Communications Corp Md | Landline | < 1% |
| Level 3 Communications Llc Md | Landline | < 1% |
| Halo Wireless Services Inc | Wireless | < 1% |
| Atx Telecommunications Services Ltd | Landline | < 1% |
| Omnipoint Communications Cap Operations Llc | Wireless | < 1% |
| Mci Worldcom Communications Inc Md | Landline | < 1% |
| Cavalier Telephone Llc Mid Atlantic Md | Landline | < 1% |
| Redi Call Communications Co | Wireless | < 1% |
| Armstrong Telephone Co Of Maryland | Landline | < 1% |
| Paetec Communications Inc Md | Landline | < 1% |
| At T Local | Landline | < 1% |
| Quantum Telecommunications Inc Md | Landline | < 1% |
| Broadview Networks Inc Md | Wireless | < 1% |
| Baltimore Washington Telephone Bwt | Landline | < 1% |
| Sprint Spectrum L P Md | Wireless | < 1% |
| Mcc Telephony Of The Mid Atlantic Llc Md | Landline | < 1% |
Prefixes
| Prefix | City | Carrier | Type |
|---|---|---|---|
| Joppa | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Lusby | Usa Mobility Wireless, Inc. | Wireless | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Sykesville | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Halo Wireless Services, Inc. | Wireless | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Clarksville | Verizon Maryland, Inc. | Landline | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Sykesville | Sprint Spectrum L.p. - Md | Wireless | |
| Whiteford | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baldwin | Verizon Maryland, Inc. | Landline | |
| Ridgely | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Mcimetro Access Transmission Services Llc | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Deale | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Frederick | Mcimetro Access Transmission Services Llc | Landline | |
| Forest Hill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Hyattsville | Tw Telecom of Maryland Llc - Md | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Belcamp | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Delmar | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Usa Mobility Wireless, Inc. | Wireless | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Woolford | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Bethlehem | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Belcamp | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Monkton | Verizon Maryland, Inc. | Landline | |
| Fruitland | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Essex | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | Sprint Spectrum L.p. | Wireless | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Centreville | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Parkton | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Union Bridge | Verizon Maryland, Inc. | Landline | |
| Dundalk | Mcimetro Access Transmission Services Llc | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Friendship | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Quantico | Verizon Maryland, Inc. | Landline | |
| Savage | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Glyndon | Verizon Maryland, Inc. | Landline | |
| Millersville | Sprint Spectrum L.p. | Wireless | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Glen Arm | Verizon Maryland, Inc. | Landline | |
| Aberdeen Proving Ground | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Sparrows Point | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Woodstock | Verizon Maryland, Inc. | Landline | |
| Hebron | Verizon Maryland, Inc. | Landline | |
| White Marsh | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Teleport Communications America, Llc - Md | Landline | |
| Halethorpe | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Stevensville | Sprint Spectrum L.p. | Wireless | |
| Curtis Bay | Verizon Maryland, Inc. | Wireless | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Linkwood | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Annapolis | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Still Pond | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Level 3 Communications, Llc - Md | Landline | |
| Savage | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Port Deposit | Verizon Maryland, Inc. | Landline | |
| Marriottsville | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Chester | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Columbia | Teleport Communications America, Llc - Md | Landline | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Broomes Island | Verizon Maryland, Inc. | Landline | |
| Crofton | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Fruitland | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Teleport Communications America, Llc - Md | Landline | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Warwick | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Claiborne | Verizon Maryland, Inc. | Landline | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Randallstown | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Cockeysville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Ellicott City | Tw Telecom of Maryland Llc - Md | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Preston | Verizon Maryland, Inc. | Landline | |
| Galena | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Upper Falls | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Millersville | Mcimetro Access Transmission Services Llc | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Mardela Springs | Verizon Maryland, Inc. | Landline | |
| Girdletree | Verizon Maryland, Inc. | Landline | |
| Huntingtown | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Gunpowder | Verizon Maryland, Inc. | Landline | |
| Fulton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Millersville | Verizon Maryland, Inc. | Landline | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Shady Side | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Salisbury | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Core Communications, Inc. - Md | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Pasadena | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Denton | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Essex | Usa Mobility Wireless, Inc. | Wireless | |
| Severn | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Easton | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Upper Fairmount | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Landline | |
| Millington | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Edgewood | Verizon Maryland, Inc. | Landline | |
| Rhodesdale | Verizon Maryland, Inc. | Landline | |
| Goldsboro | Verizon Maryland, Inc. | Landline | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Bel Air | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Odenton | Sprint Spectrum L.p. | Wireless | |
| Mardela Springs | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Linkwood | Verizon Maryland, Inc. | Landline | |
| Essex | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Huntingtown | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Perry Point | Verizon Maryland, Inc. | Landline | |
| North East | Armstrong Telephone Co. of Maryland | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Salisbury | Idt America Corp - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Level 3 Communications, Llc - Md | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Pasadena | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Crapo | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Columbia | Mcimetro Access Transmission Services Llc | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Grasonville | Verizon Maryland, Inc. | Landline | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Fallston | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Oxford | Verizon Maryland, Inc. | Landline | |
| Bel Air | Mcimetro Access Transmission Services Llc | Landline | |
| Hyattsville | Landline | ||
| Saint Leonard | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hanover | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Parkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Sykesville | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Street | Verizon Maryland, Inc. | Landline | |
| Mount Airy | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Huntingtown | Verizon Maryland, Inc. | Landline | |
| Sykesville | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Ellicott City | Usa Mobility Wireless, Inc. | Landline | |
| White Hall | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Henderson | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mcimetro Access Transmission Services Llc | Landline | |
| Salisbury | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Phoenix | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Westminster | Verizon Maryland, Inc. | Landline | |
| Severna Park | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Galena | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Easton | Level 3 Communications, Llc - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Wireless | |
| Towson | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Solomons | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Pikesville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Silver Spring | Usa Mobility Wireless, Inc. | Wireless | |
| Salisbury | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Usa Mobility Wireless, Inc. | Wireless | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Hebron | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Taneytown | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Arnold | Verizon Maryland, Inc. | Landline | |
| Cordova | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Pikesville | Verizon Maryland, Inc. | Landline | |
| Salisbury | Aquis Communications, Inc. | Wireless | |
| Galena | Verizon Maryland, Inc. | Landline | |
| Riva | Verizon Maryland, Inc. | Landline | |
| Stockton | Verizon Maryland, Inc. | Landline | |
| Eden | Verizon Maryland, Inc. | Landline | |
| Edgewood | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Fort Howard | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Dowell | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Queenstown | Idt America Corp - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Lightwave Communications, Llc - Md | Landline | |
| Cockeysville | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Easton | Sprint Spectrum L.p. | Wireless | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Street | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Mcimetro Access Transmission Services Llc | Landline | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Laurel | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Halethorpe | Broadview Networks, Inc. - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Sudlersville | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Redi-call Communications Co | Wireless | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Street | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Marion Station | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Finksburg | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Randallstown | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Denton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Edgewater | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Church Hill | Sprint Spectrum L.p. | Wireless | |
| Pikesville | Bandwidth.com Clec, Llc - Md | Wireless | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Trappe | Verizon Maryland, Inc. | Landline | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Nottingham | Verizon Maryland, Inc. | Landline | |
| Columbia | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Baltimore | Usa Mobility Wireless, Inc. | Wireless | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Mci Worldcom Communications, Inc. - Md | Landline | |
| Dundalk | Teleport Communications America, Llc - Md | Landline | |
| Trappe | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Teleport Communications America, Llc - Md | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Wireless | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Catonsville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Fruitland | Verizon Maryland, Inc. | Landline | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Rock Hall | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glenwood | Sprint Spectrum L.p. | Wireless | |
| Owings Mills | Verizon Maryland, Inc. | Landline | |
| Elkridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Ewell | Verizon Maryland, Inc. | Landline | |
| Hunt Valley | Bandwidth.com Clec, Llc - Md | Landline | |
| Salisbury | Redi-call Communications Co | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Prince Frederick | Verizon Maryland, Inc. | Landline | |
| Glenwood | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lusby | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Cambridge | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Owings Mills | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Hanover | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| West River | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Parsonsburg | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewood | Teleport Communications America, Llc - Md | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Tylerton | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Deal Island | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| White Hall | Verizon Maryland, Inc. | Landline | |
| Reisterstown | Verizon Maryland, Inc. | Landline | |
| Fork | Mcimetro Access Transmission Services Llc | Landline | |
| Cordova | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Ellicott City | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Joppa | Verizon Maryland, Inc. | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rosedale | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Elkton | Verizon Maryland, Inc. | Landline | |
| Parkville | Verizon Maryland, Inc. | Landline | |
| Linthicum Heights | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Centreville | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Verizon Maryland, Inc. | Landline | |
| Severn | Verizon Maryland, Inc. | Landline | |
| Hanover | Teleport Communications America, Llc - Md | Landline | |
| Aberdeen | Verizon Maryland, Inc. | Landline | |
| Annapolis | Usa Mobility Wireless, Inc. | Wireless | |
| Linthicum Heights | Tw Telecom of Maryland Llc - Md | Landline | |
| Rockville | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Churchville | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Worton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Laurel | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Baltimore | Mcc Telephony of the Mid-atlantic, Llc - Md | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Landline | ||
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Gambrills | Verizon Maryland, Inc. | Landline | |
| Annapolis | Paetec Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Queen Anne | At&t Local | Landline | |
| Gwynn Oak | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Edgewater | Verizon Maryland, Inc. | Landline | |
| Sherwood | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Towson | Mcimetro Access Transmission Services Llc | Landline | |
| Whaleyville | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Peerless Network of Maryland, Llc | Landline | |
| Chestertown | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Dundalk | Verizon Maryland, Inc. | Landline | |
| Edgewater | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Lutherville Timonium | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Salisbury | Mci Worldcom Communications, Inc. - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Baltimore | Quantum Telecommunications, Inc. - Md | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Owings Mills | Mcimetro Access Transmission Services Llc | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Conowingo | Verizon Maryland, Inc. | Landline | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Owings Mills | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Whaleyville | Verizon Maryland, Inc. | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Millington | Verizon Maryland, Inc. | Landline | |
| Laurel | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Havre De Grace | Verizon Maryland, Inc. | Landline | |
| Towson | Mci Worldcom Communications, Inc. - Md | Landline | |
| Baltimore | Landline | ||
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sparks Glencoe | Verizon Maryland, Inc. | Landline | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Glen Burnie | Usa Mobility Wireless, Inc. | Wireless | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Verizon Maryland, Inc. | Landline | |
| Middle River | Verizon Maryland, Inc. | Landline | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fallston | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Annapolis | Verizon Maryland, Inc. | Landline | |
| Catonsville | Verizon Maryland, Inc. | Landline | |
| Ellicott City | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Wireless | |
| Lanham | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Elkridge | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Baltimore-washington Telephone Bwt | Landline | |
| Dowell | Verizon Maryland, Inc. | Landline | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Severna Park | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Berlin | Sprint Communications Company, L.p. - Md | Landline | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Severna Park | Armstrong Telecommunications, Inc. - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| White Marsh | Sprint Spectrum L.p. | Wireless | |
| Catonsville | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Odenton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Severna Park | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| East New Market | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Easton | Mci Worldcom Communications, Inc. - Md | Landline | |
| Linthicum Heights | Verizon Maryland, Inc. | Landline | |
| Finksburg | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Bel Air | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| North East | Usa Mobility Wireless, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Columbia | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Glen Burnie | Verizon Maryland, Inc. | Landline | |
| Forest Hill | Cavalier Telephone, Llc (mid-atlantic) - Md | Landline | |
| Crofton | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Parkville | Comcast Phone of Northern Maryland, Inc. - Md | Landline | |
| Chesapeake City | Mcimetro Access Transmission Services Llc | Landline | |
| Odenton | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Berlin | Verizon Maryland, Inc. | Landline | |
| Crownsville | Verizon Maryland, Inc. | Landline | |
| Finksburg | Mcimetro Access Transmission Services Llc | Landline | |
| Curtis Bay | Verizon Maryland, Inc. | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Keymar | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Savage | Baltimore-washington Telephone Bwt | Landline | |
| Laurel | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Omnipoint Communications Cap Operations, Llc | Wireless | |
| Baltimore | Ctc Communications Corp. - Md | Landline | |
| Halethorpe | Tw Telecom of Maryland Llc - Md | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Fork | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Centreville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Annapolis | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkridge | Sprint Spectrum L.p. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Preston | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Halethorpe | Verizon Maryland, Inc. | Wireless | |
| Belcamp | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Annapolis | Atx Telecommunications Services, Ltd | Landline | |
| Stevensville | Verizon Maryland, Inc. | Landline | |
| Catonsville | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Towson | Usa Mobility Wireless, Inc. | Wireless | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Glyndon | Mcimetro Access Transmission Services Llc | Landline | |
| Lutherville Timonium | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Bowie | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Davidsonville | Verizon Maryland, Inc. | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Whaleyville | Verizon Maryland, Inc. | Landline | |
| Crofton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Teleport Communications America, Llc - Md | Landline | |
| Sykesville | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Tracys Landing | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Elkton | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Windsor Mill | Teleport Communications America, Llc - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Baltimore | Cellco Partnership Dba Verizon Wireless - Md | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Ocean City | Verizon Maryland, Inc. | Landline | |
| Baltimore | Verizon Maryland, Inc. | Landline | |
| Rock Hall | Verizon Maryland, Inc. | Landline | |
| Baltimore | Mcimetro Access Transmission Services Llc | Landline | |
| Easton | Cellco Partnership Dba Verizon Wireless - Md | Wireless | |
| Laurel | Verizon Maryland, Inc. | Wireless | |
| Columbia | Usa Mobility Wireless, Inc. | Wireless | |
| Elkridge | Verizon Maryland, Inc. | Wireless | |
| Crofton | Mcimetro Access Transmission Services Llc | Landline | |
| Baltimore | Cavalier Telephone Mid-atlantic, Llc - Md | Landline | |
| Nottingham | New Cingular Wireless Pcs, Llc - Dc | Wireless | |
| Laurel | Verizon Maryland, Inc. | Wireless |