Area code 231 - Citizendia

Area code 231 was created in June 1999 as a split from area code 616. Area code 616 was one of the original area codes of 1947. It covered all of the Western Lower half of Michigan and Michigan's Upper Peninsula. 231 is essentially the northern half of the old 616 area code. 616 previously covered the entire western half of the state of Michigan, extending west from the north-south line aligned with the Mackinac Bridge. The Mackinac Bridge (ˈmækɨnɔː with a silent "c" at the end of the word is a Suspension bridge spanning the Straits of Mackinac to connect the

The new 231's southern boundary closely follows the county lines between Muskegon County and Ottawa County and Kent County and Montcalm County. Muskegon County is a county in the US state of Michigan. As of the 2000 census, the population was 170200 with the 2006 census estimate Ottawa County is a county in the US state of Michigan. As of the 2000 census, the population was 238314 with a projection of 257671 Kent County is a county in the US state of Michigan. It is part of the Grand Rapids &ndash Wyoming Metropolitan Statistical Montcalm County is a county in the US state of Michigan. As of the 2000 census, its population was 61266

Among the Michigan cities it serves are Big Rapids, Cadillac, Grant, Ludington, Muskegon, Petoskey, and Traverse City. Michigan ( is a Midwestern state of the United States of America. Big Rapids is a city in the US state of Michigan. As of the 2000 census, the city population was 10849 Cadillac is a city in the US state of Michigan and is the County seat of Wexford County. Grant is a city in Newaygo County in the US state of Michigan. Muskegon (mus-kēg'n is a city in the US state of Michigan. As of the 2000 census, the city population was 40105 Petoskey is a city in the US state of Michigan. As of the 2000 census, the city population was 6080 Traverse City is a City in the US state of Michigan. It is the largest city in the 21-county Northern Michigan region

External links

Planning letter 167, which details 231's creation (PDF)

State of Michigan area codes: 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989
	North: 906
West: Lake Michigan	area code 231	East: 989
	South: 616

A state is a political association with effective Sovereignty over a geographic Area and representing a Population. Michigan ( is a Midwestern state of the United States of America. Area code 269 is the Telephone Area code serving the southwest portion of Michigan's Lower Peninsula. Area code 313 is the Telephone Area code serving the city of Detroit, Michigan, and some of the city's innermost suburbs(HamtramckHighland Park Area code 517 is the Area code which serves the south central portion of the Lower Peninsula of Michigan. Area code 586 is the Telephone Area code serving Macomb County, located in the state of Michigan. Area code 616 was one of the original area codes of 1947. It covered all of the Western Lower half of Michigan and Michigan's Upper Peninsula. US area code 734 covers southern portions of southeast Michigan including all of Washtenaw (its largest city being Ann Arbor) and Monroe counties and Area code 810 is the Telephone Area code serving eastern Michigan. Area code 906 is the Telephone Area code for the entire Upper Peninsula of Michigan, including the following cities Marquette Michigan Area code 989 is the area code for central Michigan, the northeastern Lower Peninsula, and portions of The Thumb. Area code 906 is the Telephone Area code for the entire Upper Peninsula of Michigan, including the following cities Marquette Michigan Lake Michigan is one of the five Great Lakes of North America, and the only one located entirely within the United States. Area code 989 is the area code for central Michigan, the northeastern Lower Peninsula, and portions of The Thumb. Area code 616 was one of the original area codes of 1947. It covered all of the Western Lower half of Michigan and Michigan's Upper Peninsula.

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