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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.
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
Area code: 406: FIPS code: 30-13375: GNIS feature ID: 2804690 [2] Centerville is a census-designated place (CDP) in Cascade County, Montana, United States.
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
Area [1] • Total. 2.15 ... 406: FIPS code: ... the reservation was reduced to 8 million acres in 1875 with a location south of modern Absarokee established as ...
To find the poorest area codes, the bottom-three lowest mean incomes per area code were averaged to come up with mean income for the entire area code. Only area codes with at least three high ...
Area code 603 in a 1956 map, covering the whole state. Area code 603 is the sole area code for the U.S. state of New Hampshire in the ... 406 Bow: Merrimack: December ...
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes.Area codes 408 and 669 are shown in red. Area codes 408 and 669 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of California.