Michigan Area Codes
Complete directory of all 12 active area codes serving Michigan. The The Great Lakes State has a population of 10,050,511 (2023 estimate) and uses 12 area codes.
About Area Codes in Michigan
Michigan (MI) is the The Great Lakes State, located in the Midwest region of the United States. With a 2023 population of 10,050,511 residents, Michigan is served by 12 active area codes. The state capital is Lansing and the largest city is Detroit.Michigan's official motto is "Si quaeris peninsulam amoenam circumspice."
Area code assignments in Michigan follow the North American Numbering Plan (NANP), which has been in effect since 1947. As the state's population and demand for phone numbers grew — driven by the rise of cell phones, fax machines, pagers, and VoIP lines — regulators either split existing area codes geographically or added overlay codes that share the same territory. That's why Michigan now has 12 codes: 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989.
When you receive a call from a Michigan number, the area code tells you only where the number was originally assigned. Because of Local Number Portability (LNP), which took effect in 2003, callers can keep their phone numbers even when moving across state lines. So while a 231 number was once assigned in Michigan, the person calling you could be anywhere in the US today.
Time zones in Michigan
Michigan observes the Eastern time zone. Daylight Saving Time is observed from the second Sunday in March through the first Sunday in November, when clocks shift forward by one hour. When you call a Michigan number from outside the state, double-check the local time above each area code detail page to avoid calling at unreasonable hours.
Phone number format in Michigan
All Michigan phone numbers follow the standard 10-digit NANP format: (NPA) NXX-XXXX. For local calls within Michigan, you typically need to dial the full 10-digit number — even for calls within the same area code — because of mandatory 10-digit dialing imposed by the FCC for areas with overlay codes (most of Michigan's territory). For long-distance calls within the NANP, dial 1 + area code + 7-digit number.
Frequently asked questions about Michigan area codes
How many area codes does Michigan have?
Michigan currently has 12 active area codes: 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989.
What is Michigan's original area code?
The oldest area code(s) in Michigan were assigned in 1947 as part of the original 86 NANP codes. These legacy codes typically covered the entire state at first, then were split as demand grew.
What time zone is Michigan in?
Michigan is in the Eastern time zone.
Will Michigan get more area codes?
As Michigan's population and number demand grow, NANPA may assign additional overlay codes. When the current codes run out of available prefixes, regulators announce public hearings and propose new codes. The AreaCodeCentral team tracks these announcements and updates the directory within 24 hours of any new code activation.