Michigan area codes
The table below lists every active Michigan area code with its coverage, service date and prefix count. 5 of the 13 codes are overlays — added on top of existing territories as numbers ran short.
Geographically the map reads: 248 (Pontiac), 313 (Detroit), 989 (Saginaw), 734 (Ann Arbor), 517 (Lansing), 231 (Muskegon), 586 (Mount Clemens), 616 (Grand Rapids), with 4 more codes covering the rest of the state. Each code page lists its full coverage down to individual rate centers.
3 overlay complexes operate in Michigan: 248/947, 313/679, 679/734. Inside a complex the codes share territory and local calls take ten digits.
Since 2010 the state has gained 1 code: 679 (2025).
Michigan numbering spans Eastern and Central time, and some individual codes straddle the boundary themselves.
Note that toll-free codes (800, 833, 844, 855, 866, 877, 888) sit outside this list — they have no geographic tie to Michigan or anywhere else, and are assigned individually from the national SMS/800 registry.
As everywhere in the NANP: these codes say where numbers were issued, not where callers are. Per-code pages break coverage down to rate centers and prefixes.
| Code | Major area | In service | Overlay complex | Prefixes |
|---|---|---|---|---|
| 231 | Muskegon | 1999 | — | 571 |
| 248 | Pontiac | 1997 | 248/947 | 785 |
| 269 | Kalamazoo | 2002 | — | 542 |
| 313 | Detroit | 1947 | 313/679 | 763 |
| 517 | Lansing | 1947 | — | 610 |
| 586 | Mount Clemens | 2001 | — | 544 |
| 616 | Grand Rapids | 1947 | — | 544 |
| 679 | — | 2025 | 313/679 | — |
| 734 | Ann Arbor | 1997 | 679/734 | 699 |
| 810 | Flint | 1993 | — | 503 |
| 906 | Marquette | 1961 | — | 356 |
| 947 | Ortonville | 2002 | 248/947 | 208 |
| 989 | Saginaw | 2001 | — | 722 |
FAQ
How many area codes does Michigan have?
13 geographic area codes are currently in service: 231, 248, 269, 313, 517, 586, 616, 679, 734, 810, 906, 947, 989.
What was Michigan's first area code?
313, in service since 1947.
Will Michigan get a new area code soon?
Not soon. The earliest exhaust forecast in the state is 989 at 2Q 2038, so current codes have ample capacity.
Which time zone are Michigan numbers in?
Michigan codes span Eastern and Central time; check each code's page for its zone.