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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 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 ...
Area codes: 301, 240: FIPS code: 24-31175: GNIS feature ID: 2390591 [9] Website: gaithersburgmd.gov: ... Via MD 200, I-370 connects Gaithersburg with Interstate 95 ...
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 ...
The Washington metropolitan area has the largest science and engineering work force of any metropolitan area in the nation in 2006 according to the Greater Washington Initiative at 324,530, ahead of the combined San Francisco Bay Area work force of 214,500, and Chicago metropolitan area at 203,090, citing data from U.S. Census Bureau, the ...
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
Area codes 410, 443, and 667 This page was last edited on 24 December 2023, at 10:16 (UTC). Text is available under the Creative Commons Attribution ...
ZIP Codes were not changed, so most of North Potomac uses the 20878 code used by Gaithersburg and part of Darnestown. [12] ... DC–VA–MD Urbanized Area. [45]