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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.
American Express usually uses the four-digit code on the front of the card, referred to as the card identification code (CID), but also has a three-digit code on the back of the card, referred to as the card security code (CSC). American Express also sometimes refers to a "unique card code". [2] "CVD" or "card verification data": Discover
1947: Area codes 313, 517 and 616 are three of the original 86 area codes in the North American Numbering Plan. 1961: Area code 906 was created in the first split of 616. 1993: Area code 810 was created in the first split of 313. 1997: Area code 734 was created in the second split of 313. and area code 248 was created in the first split of 810 ...
The rest of Wayne County, including Detroit, located to the southeast, is serviced by area codes 313 and 734. Area code 248 was created in 1997 as a split from area code 810. In 2000, area code 947 was assigned as a relief area code for the area. [1] In 2001, it was approved as an all-services overlay plan in the 248 numbering plan area, [2 ...
Area code 989 is a telephone area code in the North American Numbering Plan for Central Michigan, the northeastern Lower Peninsula, and portions of the Thumb. It is the highest-numbered area code in use in the North American Numbering Plan (NANP), [ 1 ] as well as the highest possible under the current system, in which a middle digit of 9 is ...
Map of area code 734 in Michigan. 734 is an area code in the North American Numbering Plan . Created in 1997, it covers southern portions of southeast Michigan , including all of Washtenaw and Monroe counties, and southern and western portions of Wayne County .
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 517 is the area code which serves the south central portion of the Lower Peninsula of Michigan, centered on the state capital, Lansing. Other notable cities within 517 include Charlotte, Mason, Eaton Rapids, East Lansing, Holt, Jackson, Albion, Howell, Coldwater, Adrian, Blissfield, and Hillsdale. 517 was one of the original area ...