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area code 313
Area code 313 is an area code within the North American Numbering Plan serving Detroit and most of its closest suburbs in Wayne County, Michigan. It includes the enclave cities Hamtramck and Highland Park, as well as Dearborn, Dearborn Heights, Inkster, Melvindale, the Grosse Pointe communities, Lincoln Park, Redford, and Taylor north of Goddard Road.
==History==
The Numbering Plan Area 313 was created in 1947 and received one of the original 86 area codes. Originally, it included the entire southeastern quadrant of Michigan, including Metro Detroit, Flint, and the southern part of Michigan's "Thumb." AT&T assigned Detroit an area code with only seven dial pulses (rotary dialing), the fourth shortest of the major cities after New York (212), Los Angeles (213) and Chicago (312).
Because of the demand for new telephone service, area code 810 was created for the northern suburbs, Flint, and the southern Thumb on December 1, 1993. On December 13, 1997, the 313 area was further divided, creating the 734 area out of Washtenaw County, Monroe County, and western and Downriver Wayne County.
Area code 679 has been reserved as a future overlay to the 313 area.〔http://www.nanpa.com〕〔(article on Michigan Area codes )〕 Relief planning is in progress〔 and 2014 estimates do not expected 313 to be exhausted until 2019.〔http://www.nanpa.net/pdf/NRUF/October_2014_NPA_Exhaust_Projections.pdf〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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