Zip Area Code

Area code 231

Area code 231 is a Michigan area code, in service since June 5, 1999.

It was created from area code 616.

Local calls are dialed with seven digits; dialing ten digits also works.

It is in the Eastern Time zone.

State
Michigan
In service since
June 5, 1999
Local dialing
seven digits; dialing ten digits also works
Time zone
Eastern Time
ZIP codes
138

Map

Map of the 231 area codeThe shaded area shows where 231 numbers are rated, with the neighboring area codes outlined around it.715906920989262248810517616MuskegonTraverse CityPetoskeyCadillacBig RapidsLudingtonCheboyganFremont
Approximate 231 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 231

Overlays and neighboring area codes

Neighboring area codes: 715, 608, 269, 906, 920, 989, 262, 248, 586, 810, 517, 616, 414.

Counties in area code 231

Towns in area code 231

And 122 more towns: every town in Michigan.

Local numbers in area code 231

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