Michigan Area Code Information

Michigan Area Codes


Michigan Area Code Overlays
(248 and 947)


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.





Area code 616 was put into service. In 1961 area code 616 was split to form area code 906. In 1999 area code 616 was split to form area code 231. In 2002 area code 616 was split to form area code 269.

03/19/1961
Area code 906 was put into service. Area code 906 was created from a split of area code 616.

12/01/1993
Area code 810 was put into service. Area code 810 was created from a split of area code 313. In 1997 area code 810 was split to form area code 248. In 2001 area code 810 was split to form area code 586.

05/10/1997
Area code 248 was put into service. Area code 248 was created from a split of area code 810. In 2002 area code 248 was overlaid with area code 947.

12/13/1997
Area code 734 was put into service. Area code 734 was created from a split of area code 313.

06/05/1999
Area code 231 was put into service. Area code 231 was created from a split of area code 616.

04/07/2001
Area code 989 was put into service. Area code 989 was created from a split of area code 517.

09/22/2001
Area code 586 was put into service. Area code 586 was created from a split of area code 810.

07/13/2002
Area code 269 was put into service. Area code 269 was created from a split of area code 616.

09/07/2002
Area code 947 was put into service. Area code 947 is an overlay of area code 248.

not in service
Area code 679 is proposed as an overlay of area code 313 but is not yet in service.






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