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Area code 231 is a telephone area code in the North American Numbering Plan (NANP) for the northwestern portion of the Lower Peninsula in the U.S. state of Michigan , History.
231 is an area code in Michigan, US, serving Muskegon and other cities and counties. It lies within the Eastern Time zone (ET), with daylight saving time (DST) from March to November.
Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.
CodeTerritory Or UseDate200not in use; available for non-geographic ...easily recognizable code (ERC)New Jersey ( Bergen County and Hudson ...19471947Southwestern Connecticut ( Bridgeport, ...1947References. List of Michigan area codes. This is a list of telephone area codes in the U.S. state of Michigan : 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.
This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA). An area code is part of a telephone number in the United States, Canada, and the Caribbean.
Area code 231 covers much of northwestern Michigan and was created from a split of area code 616 in 1999. It includes counties and cities such as Antrim, Benzie, Charlevoix, Cheboygan, Emmet, Grand Traverse, Kalkaska, Kent, Lake, Leelanau, Mackinac, Manistee, Mecosta, Missaukee, Montcalm, Muskegon, Newaygo, Oceana, Osceola, Otsego, Wexford, Big Rapids, Cadillac, Ludington, Manistee, Muskegon, Norton Shores, Petoskey, Shelby, and Traverse City.
Area code 231 is a telephone area code in the North American Numbering Plan (NANP) for the northwestern portion of the Lower Peninsula in the U.S. state of Michigan, (en) rdfs:label: Area code 231 (en) owl:sameAs: freebase:Area code 231; yago-res:Area code 231; wikidata:Area code 231; https://global.dbpedia.org/id/4Rvy4; geo:geometry: POINT(-85 ...
