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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
Tysons Corner has more Fortune 500 company headquarters than Washington, D.C. [1]. This is a list of notable companies headquartered in Northern Virginia.The majority of the following companies are located in Fairfax County and Loudoun County the most populous jurisdictions in Northern Virginia, Virginia state, and the Baltimore-Washington metropolitan area.
The three area codes are overlay codes for one numbering plan area, among which 410 was the initial area code for the NPA, when it was split from area code 301 in 1991. 443 and 667 found assignment primarily in cellular service and for competitive local exchange carriers, such as Comcast and Cavalier Telephone, when introduced, but have since ...
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 was 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 population density of Virginia Many towns are as large as cities but are not incorporated as cities and are situated within a parent county or counties. Seven independent cities had 2020 populations of less than 10,000 with the smallest, Norton having a population of only 3,687. [ 2 ]
Companies based in Fairfax County, Virginia (5 C, ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ... Code of Conduct;