Michigan area codes
- Area codes in
- 12
- State
- Michigan
- Local time
- Eastern Time
Michigan is served by 12 area codes, from 313 in 1947 to 947 in 2016. 1 of them are overlays, added as older codes filled up.
Updated 28 July 2026
All area codes in Michigan
Michigan is served by 12 area codes. 313 is the oldest, in service since 1947; 947 is the newest, activated in 2016.
Michigan area code map
Michigan sits in the Eastern Time zone, with its 12 codes spread across the state.
Michigan area codes by city
These are the Michigan cities served by more than one area code, or whose code also covers a wider area.
Ann Arbor
Detroit
Flint
Grand Rapids
Kalamazoo
Lansing
Marquette
Overlay codes and dialling rules in Michigan
1 of Michigan’s 12 area codes are overlays — a second code laid over an existing footprint instead of splitting it. Wherever an overlay operates, local calls require the full ten-digit number.
Spam call reports in Michigan
These Michigan area codes drew the most reports to the FTC in the 30 days to 28 July 2026. The figures describe numbers displaying each code, which caller ID spoofing can fake.
Most reported Michigan area codes · last 30 days
| Code | Primary city | Reports |
|---|---|---|
| 231 | Muskegon | 668 |
| 810 | Flint | 661 |
| 989 | Saginaw | 560 |
| 269 | Kalamazoo | 528 |
| 313 | Detroit | 513 |
| 734 | Ann Arbor | 482 |
| 248 | Troy | 376 |
| 616 | Grand Rapids | 345 |
A number listed here may itself be a spoofing victim rather than the caller. These are unverified consumer reports.
Source: FTC Do Not Call Reported Calls Data, unverified consumer reports, retrieved 28 July 2026. Request a correction.
Calls from your Michigan numbers not landing?
Questions
How many area codes does Michigan have?
Michigan has 12 area codes: 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989.
What is the main area code for Detroit?
The main area code for Detroit is 313.
Which Michigan area code is oldest?
Area code 313 is the oldest in Michigan, in service since 1947.
Do I need to dial ten digits in Michigan?
Yes, anywhere an overlay operates. 1 of Michigan’s codes are overlays, and ten-digit dialling is required for local calls in those areas.
Which Michigan area code gets the most spam calls?
Area code 231 (Muskegon) drew the most reports of any Michigan code in the 30 days to 28 July 2026, with 668 numbers reported.