231 Area Code


Area code 231 is an area code that covers the Northwestern part of the Lower Peninsula in Michigan.

Michigan has area codes of 231, 248, 269, 313, 517, 586, 616, 679, 734, 810, 906, 947, 989.

Time Zone:Eastern GMT -5:00 with Daylight Saving in the Summer
In Service Date:05-Jun-99

Counties that Use 231 Area Code

Major Cities that Use 231 Area Code

All Cities & Towns that Use 231 Area Code


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Where is 231 area code?

The following map shows the coverage of 231 area code. The coverage area is shown in green.

Area code map of the entire U.S.

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