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area code

Biggest city:





Eastern (GMT -5)

Nearby area codes: 

Zip codes



Major Cities:

Muskegon, Allendale, Traverse City, Cadillac, Big Rapids​


Average Income:





Unemployment Rate:

The 231 area code is a significant part of Michigan's telecommunications infrastructure, serving a large portion of the state's western and northern regions. Establishment and Purpose: The 231 area code was created on June 5, 1999, as a split from the 616 area code. This split was necessitated by the growing demand for new telephone numbers in the region, driven by increasing population and the proliferation of cell phones and pagers. The introduction of the 231 area code was aimed at providing a sufficient supply of telephone numbers to meet these expanding communication needs in western and northern Michigan. Geographical Coverage: The 231 area code covers a vast area of western and northern Michigan, including cities such as Muskegon, Traverse City, and Ludington. It encompasses many smaller communities as well, extending up to the northernmost parts of the Lower Peninsula. The region is known for its picturesque landscapes, including the shores of Lake Michigan, and is a popular destination for tourism and outdoor activities. Economic and Cultural Significance: The area served by the 231 area code is diverse in terms of its economy and culture. It includes important agricultural areas, thriving tourism and hospitality industries, and a rich cultural heritage, with numerous festivals and events throughout the year. The 231 area code supports a wide range of industries and communities, from the bustling tourist towns along the coast to the rural inland areas, playing a crucial role in the local economy and community connectivity. These facts about the 231 area code underscore its essential role in supporting the vibrant and diverse regions of western and northern Michigan. By providing a dedicated telecommunication infrastructure, the 231 area code ensures that the region's unique economic, cultural, and social needs are efficiently met.
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