Michigan area codes
- Area codes in
- 12
- State
- Michigan
- 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 8 October 2026
Now in Michigan
Eastern Time · UTC−5, UTC−4 in summer
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Eastern Time
Typical business hours, 9 to 5 Monday to Friday.
Typical business hours, 9 to 5 Monday to Friday, shown as the blue arc. A guide to when a real Michigan office is likely to answer. It says nothing about who called you.
01
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.
02
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.
03
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.
04
Spam call reports in Michigan
These Michigan area codes drew the most reports to the FTC in the 30 days to 8 October 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 (30 days) |
|---|---|---|---|
| 1 | 231 | Muskegon | 735 |
| 2 | 810 | Flint | 627 |
| 3 | 616 | Grand Rapids | 590 |
| 4 | 989 | Saginaw | 503 |
| 5 | 313 | Detroit | 489 |
| 6 | 734 | Ann Arbor | 471 |
| 7 | 269 | Kalamazoo | 417 |
| 8 | 248 | Troy | 413 |
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 8 October 2026. Request a correction. Month-over-month figures appear once two complete 30-day windows exist.
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05
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, wherever an overlay operates. 1 of Michigan’s area codes are overlays, and local calls within an overlay area require the full ten-digit number.
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 8 October 2026, with 735 numbers reported.
Neighbouring states
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