Midwest region · Eastern Time
Michigan Area Codes
All 12 area codes serving Michigan, the cities each one covers, and which are overlays. Michigan is served by 12 area codes in the Eastern Time zone.
Last updated June 5, 2026
Full list
Every Michigan area code
Michigan is served by 12 area codes in the Eastern Time zone. 2 of these are overlay codes layered over busy metros; the rest are geographic codes. Eastern statewide except four Upper Peninsula counties near Wisconsin (Central).
| Code | Main city | Type | Status |
|---|---|---|---|
| 231 | Muskegon | Geographic | In service |
| 248 | Troy | Overlay | In service |
| 269 | Kalamazoo | Geographic | In service |
| 313 | Detroit | Geographic | In service |
| 517 | Lansing | Geographic | In service |
| 586 | Warren | Geographic | In service |
| 616 | Grand Rapids | Geographic | In service |
| 734 | Ann Arbor | Geographic | In service |
| 810 | Flint | Geographic | In service |
| 906 | Marquette | Geographic | In service |
| 947 | Troy | Overlay | In service |
| 989 | Saginaw | Geographic | In service |
Area codes and dialing in Michigan
Michigan's 12 area codes mix older geographic codes with newer overlays. The busiest metros — around Ann Arbor, Detroit, Flint — carry the most numbers and rely on overlays, which is why 10-digit dialing is required there. Quieter parts of the state may still use a single code. The original code in the Michigan list is 231 (Muskegon).
Whenever a Michigan region runs low on numbers, a new overlay is added on top rather than splitting the map, so existing customers keep their numbers. See 10-digit dialing for what that means in practice, or the newest area codes for upcoming changes.
Cities with multiple area codes
These Michigan metros are served by an overlay of two or more codes, so 10-digit dialing applies: Troy.
Browse Michigan another way
Explore by Midwest region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Michigan area code FAQ
How many area codes does Michigan have?
Michigan currently has 12 area codes: 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989.
What is the main area code for Michigan?
The busiest metro in Michigan is served by the 231 code. Major cities include Ann Arbor, Detroit, Flint, Grand Rapids, Kalamazoo.
Does Michigan require 10-digit dialing?
Yes, in its overlay metros you must dial all 10 digits. Ten-digit dialing is the national standard.