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    What are the telephone area codes in Michigan?

    Where is area code 231 in Michigan?

    What are the 616 area codes in Michigan?

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  2. Michigan has 11 area codes including 1 overlay making it a total of 12 area codes. Of the 12, one area code is assigned to provide phone numbers but is not currently in use. Michigan originally had only 3 area codes — 313, 517 and 616. Subsequent area codes were added in the following years when the State’s population grew.

  3. Online Business Registration. The Michigan Department of Treasury offers an Online New Business Registration process. This process is easy, fast, secure and convenient. This e-Registration process is much faster than registering by mail. After completing this online application, you will receive a confirmation number of your electronic submission.

  4. 231 – Northwestern Lower Michigan: Traverse City, Ludington, Muskegon, Petoskey, Big Rapids and Cheboygan 248 – Northern Metro Detroit: All of Oakland County, Northville, and most of Northville Township; overlays with area code 947 269 – Southwestern Michigan: Battle Creek, Benton Harbor, Allegan, Hastings, Kalamazoo, and St Joseph

  5. Complete Treasury’s registration application. a. If the business has a federal Employer Identification Number (EIN), the EIN will also be the Treasury business account number. On the MTO homepage, click Start a New Business (E-Registration) to register the business with Treasury for Michigan taxes. The online application will open in a new tab or window on your web browser.

  6. List of All Area Codes in Michigan; Map Key Area Code Number; Area Code 231: Area Code 248 / Area Code 947: Area Code 269: Area Code 313: Area Code 517: Area Code 586 ...