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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
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 ...
Transportation companies based in Maryland (2 C, 2 P) Pages in category "Companies based in Maryland" The following 15 pages are in this category, out of 15 total.
Pages in category "Companies based in Silver Spring, Maryland" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes .
Pages in category "Companies based in Anne Arundel County, Maryland" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes .