State
Area Code 231
Muskegon, Traverse City, Petoskey, Michigan
Local time now
…
Time zone
Eastern
Main cities
Muskegon, Traverse City, Petoskey, Cadillac, Big Rapids, Ludington
Overlays
None
In service since
1999
When you can make sales calls to 231 numbers
| Monday – Friday | 9 AM – 9 PM |
| Saturday | 9 AM – 9 PM |
| Sunday | 9 AM – 9 PM |
In the called person's local time. Guidance, not legal advice.
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Other area codes in Michigan
Questions about area code 231
- Where is area code 231?
- Area code 231 is in Michigan, covering Muskegon, Traverse City, Petoskey, Cadillac.
- What time zone is area code 231?
- Eastern time.
- When can telemarketers call a 231 number?
- Federal rules allow sales calls from 8 AM to 9 PM local time, and Michigan has stricter hours shown on this page.
- Is 231 a toll-free number?
- No. 231 is a regular area code for Michigan. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.