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This is a list of telephone area codes in the U.S. state of Michigan: 231 – Northwestern Lower Michigan : Traverse City, Ludington, Muskegon, Petoskey, Big Rapids and Cheboygan 248 – Northern Metro Detroit : All of Oakland County, Northville, and most of Northville Township; overlays with area code 947
Macomb County was originally served by Detroit's area code 313, one of the original 86 area codes in the North American Numbering Plan.In 1993, area code 810 was split from 313; the service area of 810 initially included all of the former 313 outside of Monroe, Wayne, and Washtenaw counties.
Area code 810 was split off from area code 313 on December 1, 1993, with a permissive dialing period that ended on August 10, 1994. [1] The initial numbering plan area included the counties of Oakland, Macomb, Genesee, Lapeer, St. Clair, and Sanilac as well as small sections of Saginaw, Shiawassee, Livingston, Washtenaw, and Wayne counties north of Detroit.
Area code 231 was created in June 1999 by an area code split of area code 616, which had served the entire western half of the Lower Peninsula, extending west from the north-south line aligned with the Mackinac Bridge. 231 was carved out of the northern part.
The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
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Area code 662, in the northern half of Mississippi.. Area code 662 is a telephone area code in the North American Numbering Plan (NANP) for the northern half of the U.S. state of Mississippi, including the six counties (Benton, Coahoma, Desoto, Marshall, Tate and Tunica) that are part of the Memphis metro area.
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