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Michigan is currently using twelve area codes. Michigan is utilizing one area code overlay plan, often called an overlay
complex. Michigan currently has one area code which is assigned to provide numbering relief but is not yet in service.
Michigan originally had three area codes, 313, 517 and 616, when the numbering
system was established in 1947. By 1961 Michigan experienced sufficient growth in population and telephone use to need an additional area code. To meet this increase in demand area code 616 was split in 1961
to form area code 906. It was thirty two years later before the demand for new numbers in Michigan required a second split of area code 313 to form area code 810. In 1993 Michigan had five area codes in use.
To keep up with demand seven area codes were added between 1997 and 2002.
Changes and History of Michigan Area Codes:
01/01/1947
Area code 313 was put into service. In 1993 area code 313 was
split to form area code 810. In 1997 area code 313 was split to form area code 734.
01/01/1947
Area code 517 was put into service. In 2001 area code 517 was split to form area code 989. |
