Muskegon, MI is served by one area code which is area code 231. Area code 231 was put into service on June 5, 1999 and was created from a split of area code 616.
In addition to Muskegon, MI area code 231 serves much of northwestern Michigan south of the Upper Peninsula and includes the larger cities and communities of Big Rapids, Cadillac, Cheboygan, Ludington, Manistee, Muskegon, Norton Shores, Petoskey, Shelby, and Traverse City in addition to many smaller communities.
Muskegon, MI is located in Muskegon County and observes the Eastern Time Zone. View our Times by Area Code tool.