The state of Montana uses the area code 406 - the Code is one of the NANP's original eighty six area codes. The particular Code was created on October 1947 for serving the entire State of Montana. In terms of the geographical location, Montana is situated in the North Western sector of the United States. It is located on the eastern side of Idaho. The 406 area code is a unified code used all the cities of the United States. At present this is rare finding. Some of the other prominent areas using the code 406 include Helena and Gallatin Valley. Area code 406 is the only area code being used in the state of Montana
Standard Time Zone followed by the code 406 is Mountain Time Zone. Other Area codes surrounding the code 406 are:
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