Area code 301 covers part of Marylandstate, covering most of Montgomery, Prince George's, Charles, Garrett, Washington counties. It was started on Jan 01, 2000. This region follows US/Eastern + Daylight Savings timezone. Other popular area codes that belong to Maryland state include 240, 410, 443, 667.
Date Changed | Change Details |
Jun 06, 2014 | Area code 301-546 was introduced on Apr 07, 2014 and subscribers are operational from Jun 06, 2014. |
May 01, 2014 | Area code 301-569 was introduced on Sep 05, 2013 and subscribers are operational from May 01, 2014. |
Mar 21, 2014 | Area code 301-539 was introduced on Jul 20, 2010 and subscribers are operational from Mar 21, 2014. |
Mar 20, 2014 | Area code 301-501 was introduced on Mar 10, 2014 and subscribers are operational from Mar 20, 2014. |
Mar 05, 2014 | Area code 301-536 subscribers are operational from Mar 05, 2014. |
Feb 21, 2014 | Area code 301-547 was introduced on Feb 08, 2008 and subscribers are operational from Feb 21, 2014. |
Area Code | City | County | Population | Network Operator |
301-500-8 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-500-9 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-500-3 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
301-500-0 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
301-500-0 | Washington | Montgomery | 971,777 | XO Maryland LLC |
301-501-5 | Frederick | Garrett | 30,097 | MCI Worldcom Communications Inc - MD |
301-501-0 | Monrovia | Garrett | 30,097 | New Cingular Wireless PCS LLC - DC |
301-502 | Adelphi | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-503 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-504 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-505 | Temple Hills | Prince George's | 863,420 | Verizon Maryland Inc |
301-506 | Greenbelt | Prince George's | 863,420 | USA Mobility Wireless Inc |
301-507 | Berwyn Heights | Prince George's | 863,420 | Verizon Maryland Inc |
301-508-7 | Frederick | Frederick | 233,385 | Comcast Phone of Northern Maryland Inc - MD |
301-508-9 | Martinsburg | Frederick | 233,385 | Sprint Communications Company LP - MD |
301-508-0 | Monrovia | Frederick | 233,385 | New Cingular Wireless PCS LLC - DC |
301-509 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-510 | Greenbelt | Prince George's | 863,420 | USA Mobility Wireless Inc |
301-511 | 637,513 | Travel Information Services | ||
301-512 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-513 | Berwyn Heights | Prince George's | 863,420 | Verizon Maryland Inc |
301-514 | Frederick | Frederick | 233,385 | Cellco Partnership dba Verizon Wireless - MD |
301-515 | Germantown | Montgomery | 971,777 | Verizon Maryland Inc |
301-516 | Suitland | Prince George's | 863,420 | Verizon Maryland Inc |
301-517 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
301-518 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-519 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-520 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-521 | Oxon Hill | Prince George's | 863,420 | Verizon Maryland Inc |
301-522 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
301-523 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-524 | Frederick | Frederick | 233,385 | Sprint Spectrum LP |
301-525-9 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-525-0 | Laurel | Montgomery | 971,777 | Quantum Telecommunications Inc - MD |
301-526 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-527 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-528 | Germantown | Montgomery | 971,777 | Verizon Maryland Inc |
301-529 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-530 | Bethesda | Montgomery | 971,777 | Verizon Maryland Inc |
301-531-0 | Beltsville | Prince George's | 863,420 | Omnipoint Communications Cap Operations LLC |
301-531-9 | Herndon | Prince George's | 863,420 | ATX Telecommunications Services Ltd |
301-531-0 | Lanham | Prince George's | 863,420 | Starpower Communications LLC - MD |
301-531-5 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
301-532 | Hyattsville | Prince George's | 863,420 | Verizon Maryland Inc |
301-533-7 | Frederick | Garrett | 30,097 | Level 3 Communications LLC - MD |
301-533-8 | Frederick | Garrett | 30,097 | YMax Communications Corporation - MD |
301-533-9 | Martinsburg | Garrett | 30,097 | Fibernet LLC - WV |
301-533-6 | Monrovia | Garrett | 30,097 | New Cingular Wireless PCS LLC - DC |
301-533-0 | Oakland | Garrett | 30,097 | Verizon Maryland Inc |
301-534-0 | Washington | Charles | 146,551 | YMax Communications Corporation - MD |
301-535 | Beltsville | Charles | 146,551 | New Cingular Wireless PCS LLC - DC |
301-536 | Washington | St. Mary's | 105,151 | Sprint Spectrum LP - MD |
301-537 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-538 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-539-3 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
301-539-1 | Damascus | Charles | 146,551 | Core Communications Inc - MD |
301-539-8 | Herndon | Charles | 146,551 | Broadview Networks Inc - MD |
301-539-7 | La Plata | Charles | 146,551 | Verizon Maryland Inc |
301-539-6 | Mc Lean | Charles | 146,551 | Level 3 Communications LLC - MD |
301-539-5 | Silver Spring | Charles | 146,551 | Lightwave Communications LLC - MD |
301-539-9 | Washington | Charles | 146,551 | Bandwidth.com CLEC LLC - MD |
301-539-0 | Washington | Charles | 146,551 | Teleport Communications America LLC - DC |
301-540 | Germantown | Montgomery | 971,777 | Verizon Maryland Inc |
301-541-0 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
301-541-6 | Beltsville | Prince George's | 863,420 | MetroPCS Inc |
301-541-9 | Beltsville | Prince George's | 863,420 | Omnipoint Communications Cap Operations LLC |
301-541-8 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
301-541-0 | Washington | Prince George's | 863,420 | Teleport Communications America LLC - DC |
301-542-8 | Herndon | Charles | 146,551 | ATX Telecommunications Services Ltd |
301-542-9 | Washington | Charles | 146,551 | Cellco Partnership dba Verizon Wireless - MD |
301-542-1 | Washington | Charles | 146,551 | CTC Communications Corporation - MD |
301-542-0 | Washington | Charles | 146,551 | Teleport Communications America LLC - DC |
301-543-8 | Silver Spring | Prince George's | 863,420 | Lightwave Communications LLC - MD |
301-543-0 | Station Hills | Prince George's | 863,420 | Leap Wireless International Inc dba Cricket Communications Inc |
301-543-0 | Washington | Prince George's | 863,420 | Teleport Communications America LLC - DC |
301-544 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
301-545 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
301-546-0 | Landover | Prince George's | 863,420 | Verizon Maryland Inc |
301-547-1 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-547-9 | Beltsville | Montgomery | 971,777 | Omnipoint Communications Cap Operations LLC |
301-547-3 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-547-0 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-547-8 | Washington | Montgomery | 971,777 | XO Maryland LLC |
301-548 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-549-0 | Laurel | Montgomery | 971,777 | Verizon Maryland Inc |
301-549-7 | Washington | Montgomery | 971,777 | CTC Communications Corporation - MD |
301-551 | Chevy Chase | Montgomery | 971,777 | Baltimore-Washington Telephone (BWT) |
301-552 | Lanham | Prince George's | 863,420 | Verizon Maryland Inc |
301-553 | Waldorf | Charles | 146,551 | USA Mobility Wireless Inc |
301-554 | Bethesda | Montgomery | 971,777 | USA Mobility Wireless Inc |
301-555 | 359,557 | DIRECTORY ASSISTANCE | ||
301-556-8 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP - MD |
301-556-5 | Laurel | Montgomery | 971,777 | VDL Inc dba Global Telecom Brokers - MD |
301-556-0 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-557-9 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
301-557-0 | Washington | Montgomery | 971,777 | Broadwing Communications LLC - MD |
301-558 | College Park | Prince George's | 863,420 | USA Mobility Wireless Inc |
301-559 | Hyattsville | Prince George's | 863,420 | Verizon Maryland Inc |
301-560 | Chevy Chase | Prince George's | 863,420 | Paetec Communications Inc - MD |
301-561 | Chevy Chase | Montgomery | 971,777 | Baltimore-Washington Telephone (BWT) |
301-562 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-563-9 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-564 | Bethesda | Montgomery | 971,777 | Verizon Maryland Inc |
301-565 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-566 | Beltsville | Prince George's | 863,420 | Verizon Maryland Inc |
301-567 | Oxon Hill | Prince George's | 863,420 | Verizon Maryland Inc |
301-568 | Suitland | Prince George's | 863,420 | Verizon Maryland Inc |
301-569-7 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
301-569-5 | Gaithersburg | Montgomery | 971,777 | Qwest Communications Company LLC |
301-570 | Olney | Montgomery | 971,777 | Verizon Maryland Inc |
301-571 | Bethesda | Montgomery | 971,777 | Verizon Maryland Inc |
301-572 | Beltsville | Montgomery | 971,777 | Verizon Maryland Inc |
301-573 | Hagerstown | Washington | 147,430 | Sprint Spectrum LP - MD |
301-574 | Upper Marlboro | Prince George's | 863,420 | Verizon Maryland Inc |
301-575-7 | Annapolis Junction | Prince George's | 863,420 | Cellco Partnership dba Verizon Wireless - MD |
301-576 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
301-577 | Lanham | Prince George's | 863,420 | Verizon Maryland Inc |
301-578 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-579-0 | Brandywine | Prince George's | 863,420 | Verizon Maryland Inc |
301-580 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-581 | Bethesda | Montgomery | 971,777 | Verizon Maryland Inc |
301-582-8 | Monrovia | Washington | 147,430 | New Cingular Wireless PCS LLC - DC |
301-583-6 | Beltsville | Prince George's | 863,420 | MetroPCS Inc |
301-584 | Chevy Chase | Montgomery | 971,777 | Baltimore-Washington Telephone (BWT) |
301-585 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-586-7 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-587 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-588 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-589 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-590 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-591 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
301-592-7 | Beltsville | Montgomery | 971,777 | Omnipoint Communications Cap Operations LLC |
301-593 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-594 | Bethesda | Montgomery | 971,777 | Verizon Maryland Inc |
301-595 | Beltsville | Prince George's | 863,420 | Verizon Maryland Inc |
301-596 | Clarksville | Howard | 287,085 | Verizon Maryland Inc |
301-597 | Hagerstown | Washington | 147,430 | New Frontiers Telecommunications Inc |
301-598 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-599 | Clinton | Prince George's | 863,420 | Verizon Maryland Inc |
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