Area Code 231 at a Glance
| Area code | 231 |
| Region | Michigan |
| Country | United States |
| Primary timezone | America/New_York |
| Dialing format | +1 (231) NXX-XXXX |
Cities and Places Using Area Code 231
Based on prefix-level carrier data, area code 231 covers places including:
- Muskegon, MI
- Traverse City, MI
- Petoskey, MI
- Cadillac, MI
- Big Rapids, MI
- Norton Shores, MI
- Manistee, MI
- Charlevoix, MI
- Cheboygan, MI
- Whitehall, MI
- Ludington, MI
- White Cloud, MI
Frequently Asked Questions
Where is area code 231?
Area code 231 serves Michigan, United States.
Who is calling me from area code 231?
A call from area code 231 most likely originates from Michigan, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 231 number?
Within North America: dial 1-231 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 231 and the number.