231 Area Code Area Codes

Area Code: 231
State/Region: Central & NW Michigan (Lower Peninsula)
Major Cities: Grant
Time Zone: Eastern
Current Time: 3:41 PM
Date Assigned:
In Service Since: 6/5/1999
Overlay?: No
Overlay Complex:
Local Call Dialing: 7D
Toll Call Dialing: 1+10D

231 Prefixes/Exchanges

The three digits following the area code of a phone number are known as the prefix or exchange. The remaining numbers (last 4 digits) all refer to that prefix/exhange.

View Area Code 231 Prefixes ยป

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