Area code 301 covers part of Marylandstate, covering most of Montgomery, Prince George's, Frederick, Charles, 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 |
Apr 02, 2014 | Area code 301-666 was introduced on Mar 05, 2014 and subscribers are operational from Apr 02, 2014. |
Mar 21, 2014 | Area code 301-636 was introduced on Jul 21, 2010 and subscribers are operational from Mar 21, 2014. |
Mar 21, 2014 | Area code 301-690 was introduced on Jul 20, 2010 and subscribers are operational from Mar 21, 2014. |
Feb 01, 2014 | Area code 301-691 was introduced on Dec 05, 2013 and subscribers are operational from Feb 01, 2014. |
Oct 01, 2013 | Area code 301-692 was introduced on Aug 05, 2013 and subscribers are operational from Oct 01, 2013. |
Sep 08, 2013 | Area code 301-660 was introduced on Aug 13, 2013 and subscribers are operational from Sep 08, 2013. |
Area Code | City | County | Population | Network Operator |
301-600-0 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-601 | Germantown | Montgomery | 971,777 | Verizon Maryland Inc |
301-602 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-603-0 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-604 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
301-605-7 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
301-605-5 | Beltsville | Montgomery | 971,777 | Omnipoint Communications Cap Operations LLC |
301-605-1 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
301-605-8 | Laurel | Montgomery | 971,777 | VDL Inc dba Global Telecom Brokers - MD |
301-605-9 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-605-0 | Poolesville | Montgomery | 971,777 | Verizon Maryland Inc |
301-606 | Frederick | Frederick | 233,385 | Cellco Partnership dba Verizon Wireless - MD |
301-607 | Buckeystown | Frederick | 233,385 | Verizon Maryland Inc |
301-607 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-607 | Mount Airy | Frederick | 233,385 | Verizon Maryland Inc |
301-607 | New Market | Frederick | 233,385 | Verizon Maryland Inc |
301-608 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-609-0 | La Plata | Charles | 146,551 | Verizon Maryland Inc |
301-609-2 | Washington | Charles | 146,551 | Cellco Partnership dba Verizon Wireless - MD |
301-610 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
301-611 | 637,613 | Telco Repair Service | ||
301-612-0 | Baltimore | Howard | 287,085 | Teleport Communications America LLC - MD |
301-613 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-614 | Berwyn Heights | Prince George's | 863,420 | Verizon Maryland Inc |
301-615 | Berwyn Heights | Prince George's | 863,420 | Verizon Maryland Inc |
301-616 | Cumberland | Garrett | 30,097 | USCOC of Cumberland Inc dba United States Cellular - MD |
301-617 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
301-618-0 | Landover | Prince George's | 863,420 | Verizon Maryland Inc |
301-618-6 | Mc Lean | Prince George's | 863,420 | US LEC of Maryland Inc |
301-618-0 | Silver Spring | Prince George's | 863,420 | Peerless Network of Maryland LLC |
301-618-9 | Washington | Prince George's | 863,420 | YMax Communications Corporation - MD |
301-619 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-620 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-621 | Columbia | Howard | 287,085 | Verizon Maryland Inc |
301-621 | Elkridge | Howard | 287,085 | Verizon Maryland Inc |
301-621 | Odenton | Howard | 287,085 | Verizon Maryland Inc |
301-622 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-623-0 | Washington | Prince George's | 863,420 | Teleport Communications America LLC - DC |
301-624 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-625 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-626 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-627 | Upper Marlboro | Prince George's | 863,420 | Verizon Maryland Inc |
301-628-9 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-628-0 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-629 | Columbia | Howard | 287,085 | Verizon Maryland Inc |
301-630 | Temple Hills | Prince George's | 863,420 | Verizon Maryland Inc |
301-631 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-632 | Waldorf | Charles | 146,551 | Verizon Maryland Inc |
301-633 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-634 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-635 | Hagerstown | Frederick | 233,385 | New Frontiers Telecommunications Inc |
301-636-4 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
301-636-0 | Landover | Prince George's | 863,420 | Verizon Maryland Inc |
301-636-7 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
301-637-9 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
301-637-0 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-637-1 | Washington | Montgomery | 971,777 | CTC Communications Corporation - MD |
301-638 | Waldorf | Charles | 146,551 | Verizon Maryland Inc |
301-639 | Frederick | Frederick | 233,385 | Cellco Partnership dba Verizon Wireless - MD |
301-640-8 | Beltsville | Montgomery | 971,777 | MetroPCS Inc |
301-640-9 | Beltsville | Montgomery | 971,777 | Omnipoint Communications Cap Operations LLC |
301-640-0 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-640-5 | Washington | Montgomery | 971,777 | Broadvox - CLEC LLC - DC |
301-641 | Adelphi | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-642 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-643 | Washington | Charles | 146,551 | Cellco Partnership dba Verizon Wireless - MD |
301-644 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-645 | Waldorf | Charles | 146,551 | Verizon Maryland Inc |
301-646 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-647 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
301-648 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-649 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-650 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-651 | Adelphi | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-652 | Chevy Chase | Montgomery | 971,777 | Verizon Maryland Inc |
301-653 | Beltsville | Charles | 146,551 | New Cingular Wireless PCS LLC - DC |
301-654 | Chevy Chase | Montgomery | 971,777 | Verizon Maryland Inc |
301-655 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-656 | Chevy Chase | Montgomery | 971,777 | Verizon Maryland Inc |
301-657 | Chevy Chase | Montgomery | 971,777 | Verizon Maryland Inc |
301-658-7 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-658-0 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-659-0 | Beltsville | Charles | 146,551 | New Cingular Wireless PCS LLC - DC |
301-659-9 | Washington | Charles | 146,551 | Sprint Spectrum LP |
301-660-8 | Hagerstown | Washington | 147,430 | Bandwidth.com CLEC LLC - MD |
301-660-0 | Monrovia | Washington | 147,430 | New Cingular Wireless PCS LLC - DC |
301-661 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
301-662 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-663 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-664 | Chevy Chase | Montgomery | 971,777 | Verizon Maryland Inc |
301-665 | Hagerstown | Washington | 147,430 | Verizon Maryland Inc |
301-666-6 | Chevy Chase | Prince George's | 863,420 | Core Communications Inc - MD |
301-666-7 | Glenn Dale | Prince George's | 863,420 | Qwest Communications Company LLC |
301-666-0 | Washington | Prince George's | 863,420 | Teleport Communications America LLC - DC |
301-667 | Monrovia | Frederick | 233,385 | New Cingular Wireless PCS LLC - DC |
301-668 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-669 | Suitland | Prince George's | 863,420 | Verizon Maryland Inc |
301-670 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
301-671 | Hagerstown | Washington | 147,430 | New Frontiers Telecommunications Inc |
301-672 | Washington | St. Mary's | 105,151 | Sprint Spectrum LP |
301-673 | Hagerstown | Frederick | 233,385 | New Frontiers Telecommunications Inc |
301-674 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
301-675 | Beltsville | Montgomery | 971,777 | Omnipoint Communications Cap Operations LLC |
301-676 | Monrovia | Frederick | 233,385 | New Cingular Wireless PCS LLC - DC |
301-677 | Washington | Prince George's | 863,420 | Teleport Communications America LLC - DC |
301-678-9 | Hagerstown | Washington | 147,430 | Bandwidth.com CLEC LLC - MD |
301-678-4 | Martinsburg | Washington | 147,430 | Sprint Communications Company LP - MD |
301-679-9 | Beltsville | Montgomery | 971,777 | MetroPCS Inc |
301-679-5 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
301-679-0 | Washington | Montgomery | 971,777 | Teleport Communications America LLC - DC |
301-680 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-681 | Silver Spring | Montgomery | 971,777 | Verizon Maryland Inc |
301-682 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-683-9 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
301-684-2 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
301-684-5 | Mc Lean | Charles | 146,551 | Level 3 Communications LLC - MD |
301-684-0 | Washington | Charles | 146,551 | Teleport Communications America LLC - DC |
301-685-3 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
301-685-6 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
301-686-4 | Beltsville | Prince George's | 863,420 | Omnipoint Communications Cap Operations LLC |
301-686-7 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
301-687-0 | Frostburg | Allegany | 75,087 | Verizon Maryland Inc |
301-688 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
301-689-0 | Frostburg | Allegany | 75,087 | Verizon Maryland Inc |
301-690-5 | Beltsville | St. Mary's | 105,151 | New Cingular Wireless PCS LLC - DC |
301-690-6 | Washington | St. Mary's | 105,151 | Bandwidth.com CLEC LLC - MD |
301-691-8 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
301-691-5 | Silver Spring | Montgomery | 971,777 | Peerless Network of Maryland LLC |
301-692-7 | Kensington | Montgomery | 971,777 | Qwest Communications Company LLC |
301-693 | Frederick | Frederick | 233,385 | Omnipoint Communications Cap Operations LLC |
301-694 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-695 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-696 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-697 | Monrovia | Allegany | 75,087 | New Cingular Wireless PCS LLC - DC |
301-698 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
301-699 | Hyattsville | Prince George's | 863,420 | Verizon Maryland Inc |
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