231 Area Code - Location, Time, Map, Cities and Census Data - ZIP-Codes.com
https://www.zip-codes.com/area-code/area-code-231.asp
WEBApr 1, 2024 · Area Code 231 is located in Michigan. It covers 106 cities, including Muskegon, Allendale, Traverse City, Cadillac, and Big Rapids. It also covers 22 counties, including Muskegon County, Grand Traverse County, …
DA: 18 PA: 89 MOZ Rank: 84