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Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...
The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes: Area codes. Numbering plan area. 227.
Area codes. 202 and 771 [60] ... 301, 240, and 227 – portions of Maryland in the Washington metropolitan area, southern Maryland, and western Maryland;
List of Maryland area codes; 0–9. Area codes 301, 240, and 227; Area codes 410, 443, and 667 This page was last edited on 6 October 2018, at 23:00 (UTC). Text ...
Maryland 's area codes highlighted in red and blue. Area codes 410, 443, and 667 are telephone area codes in the North American Numbering Plan (NANP) for the eastern half of the U.S. state of Maryland. The numbering plan area (NPA) includes the Baltimore metropolitan area and the Eastern Shore. The three area codes are overlay codes for one ...
Area codes 202 and 771. Coordinates: 38°54′N 77°2′W. The red area is the District of Columbia, served by area codes 202 and 771. Area codes 202 and 771 are telephone area codes in the North American Numbering Plan (NANP) for Washington, D.C. Area code 202 was one of the original North American area codes established in October 1947 by AT&T.
Area codes with two identical trailing digits are easily recognizable ... 227: Maryland (Silver Spring; ... easily recognizable code (ERC) 301: Maryland (Silver ...
Area codes 757 and 948. Area codes 757 and 948 are telephone area codes in the North American Numbering Plan (NANP) for the southeast corner of Virginia. Area code 757 was established July 1, 1996 in an area code split of area code 804. Area code 948 was established on February 5, 2020 forming an overlay complex with 757.