231 Area Code
Michigan, USA
Local time now · Eastern Time
3:43 AM
Area code 231 is in Michigan, USA, serving Muskegon, Norton Shores and Cadillac. It uses Eastern Time — the time there now is 3:43 AM. In service since 1999.
| Area code | 231 |
|---|---|
| Location | Michigan, USA |
| Major cities | Muskegon, Norton Shores, Cadillac |
| Time zone | Eastern Time |
| In service since | 1999 |
Other area codes in Michigan
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Frequently asked questions
Where is area code 231?
Michigan, USA — including Muskegon, Norton Shores and Cadillac.
What time zone is area code 231?
Eastern Time.
How do I call a 231 number from abroad?
Dial your international access code, then 1 (the country code), then 231 and the 7-digit number — for example +1 231 555 0100. From the UK or India dial 00 1 231 …; from Bangladesh 00 1 231 … .
Is a call from 231 a scam?
Not by itself — 231 is an ordinary geographic area code in Michigan. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.