Area Code 231 Location

Area code 231 serves Grant, Michigan, a small city in Newaygo County in West Michigan. This code covers much of the northwestern Lower Peninsula, reaching from rural farm towns to busy lakeshore communities on Lake Michigan. It links Grant to popular outdoor areas, including parts of the Manistee National Forest, and many well-known travel spots along the coast. Phones in area code 231 follow the Eastern Time Zone.

Major cities and landmarks in area code 231 include:

• Muskegon, Ludington, and Manistee on the Lake Michigan shoreline
• Traverse City and Sleeping Bear Dunes National Lakeshore
• Cadillac, Petoskey, Charlevoix, Newaygo, and Fremont

Area code 231 began service in 1999 after a split from 616 to support growth in West and Northern Michigan. It is part of the North American Numbering Plan (NANP) and is widely used across resort towns, college communities, and rural areas. Grant’s 231 numbers connect residents and businesses to regional hubs for health care, tourism, agriculture, and outdoor recreation. Expect strong ties to lakeshore tourism, small-town commerce, and year-round events across the region.

“Area code 231 was created in 1999 from area code 616.” — North American Numbering Plan Administration (NANPA)