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- Area code 406 is an area code for Montana. It was one of the first area codes created in 1947. It still covers the entire state of Montana. It is one of the longest area codes to cover the entire state without being split or overlaid.
simple.wikipedia.org › wiki › Area_code_406Area code 406 - Simple English Wikipedia, the free encyclopedia
In 1947, Georgia was a single numbering plan area (NPA) with area code 404. In 1954, 912 was assigned to its southern and central areas. The state operated with two area codes until May 3, 1992, when area code 706 was created for the two separate areas outside of the metro Atlanta area.
Area code 406 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Montana. It has been Montana's only area code since the American Telephone and Telegraph Company created a nationwide telephone numbering plan in 1947.
3 days ago · 406 is an area code located in the state of Montana, US. The largest city it serves is Billings. Location, time zone and map of the 406 area code
The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). 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.
References. Other websites. List of North American Numbering Plan area codes. 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).
May 1, 2024 · Data Last Updated: May 1, 2024. Zip-Codes.com. 406 Area Code. Download Area Code Database. Load 406 Area Code Map. Important 406 Area Code Information. Area Code 406 is located in Montana. It covers 236 cities, including Billings, Missoula, Great Falls, Bozeman, and Helena.
