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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.
ZIP codes: 59003-59004. Area code: 406: FIPS code: 30-02800: GNIS feature ID: 2407774 [2] Ashland is a census-designated place (CDP) in Rosebud County, Montana ...
406: Montana (all) 1947: 407: Florida ... area code 387 is reserved as a fifth code for the region; 648: not in use; available for geographic assignment 649: The ...
This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each. Since 1995, several relief actions in form of area code splits and overlays have expanded the list of area
Area codes 208 and 986 are telephone area codes in the North American Numbering Plan for all of Idaho. ... Montana area codes: 406: Wyoming area codes: 307: Utah area ...
Area code 606 is a telephone area code serving the eastern half of south-central and all of the ... ZIP Code Introduced 200 ... 406 Corbin: Whitley: 40701 April 19 ...
Area code 408 was split from area code 415 in 1959. The numbering plan area was reduced in geographic extent in 1998 for the creation of area code 831. In 2012, area code 669 was assigned as a second area code for same numbering plan area by overlay.
The three area codes are overlay codes for one numbering plan area, among which 410 was the initial area code for the NPA, when it was split from area code 301 in 1991. 443 and 667 found assignment primarily in cellular service and for competitive local exchange carriers, such as Comcast and Cavalier Telephone, when introduced, but have since ...