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Area codes Numbering plan area 227 240 301: western Maryland, including its suburbs of Washington, D.C. 410 443 667: eastern Maryland including Baltimore and Annapolis
List of Washington, D.C., area codes This page was last edited on 23 June 2024, at 21:03 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4. ...
once reserved as a third area code for West Virginia, but it was replaced by a 304-932 exchange area code + exchange number in Charleston; 933: not in use; available for non-geographic assignment easily recognizable code (ERC) 934: New York (Suffolk County on Long Island) July 16, 2016: overlaid on 631; 935: not in use; available for geographic ...
Area code 310 was created in a split from area code 213 on November 2, 1991. On January 25, 1997, area code 310 was split, creating area code 562 for the southeast portion of Los Angeles County and a large portion of Orange County. Area code 424 was added to the remaining numbering plan area on July 26, 2006, in an overlay plan, the first in ...
The area is designated by the Office of Management and Budget (OMB) as the Washington–Baltimore–Arlington, DC–MD–VA–WV–PA Combined Statistical Area. It is composed primarily of two major metropolitan statistical areas (MSAs), the Washington–Arlington–Alexandria, DC–VA–MD–WV MSA and the Baltimore–Columbia–Towson ...
The Washington metropolitan area, which includes the district and surrounding suburbs, is the sixth-largest metropolitan area in the U.S., with an estimated six million residents as of 2016. [135] When the Washington area is included with Baltimore and its suburbs, it forms the vast Washington–Baltimore combined statistical area.
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 ...
Map showing the location of Washington, D.C. in relation to its bordering states of Maryland and Virginia Washington, D.C. is located in the Mid-Atlantic region of the United States at 38°53′42″N 77°02′11″W / 38.89500°N 77.03639°W / 38.89500; -77.03639 , the coordinates of the Zero Milestone , on The Ellipse