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Montana numbering plan area and area code (blue) 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.
Time zone: UTC-7 (Mountain (MST)) • Summer : UTC-6 (MDT) ZIP Code: 59482 . Area code: 406: FIPS code: 30-62825: GNIS feature ID: 2806677 [2]
prior to 1991, was the area code for Mexico City; split of 416; 2001: overlaid by 289; 2013: overlaid by 365; 2021: overlaid by 742 [8] 537 reserved as a fifth area code for the region. 906: Michigan (Upper Peninsula: Sault Ste. Marie, Escanaba, Houghton, Iron Mountain, Marquette, Menominee, etc.) March 19, 1961: split of 616; 907
Time zone: UTC-7 (Mountain (MST)) ... 59070. Area code: 406: GNIS feature ID: 2583838 [2] Roberts is a census-designated place and unincorporated town in Carbon ...
Time zone: UTC-7 (Mountain (MST)) ... Area code: 406: FIPS code: 30-69725: GNIS feature ID: 2583848 [2] South Hills is a census-designated place (CDP) in Jefferson ...
Time zone: Mountain (MST) ... Area code: 406: GNIS feature ID: 770001 [1] Coalwood is an unincorporated community in northern Powder River County, Montana, United States.
The coastal area to the west was assigned area code 415. [2] Area code 408 was split from numbering plan area 415 in a flash-cut (without permissive dialing period) on March 1, 1959. The new numbering plan area included most of Santa Clara, Santa Cruz, Monterey and San Benito Counties.
Time zone: UTC-7 (Mountain (MST)) • Summer : UTC-6 (MDT) ZIP Code: 59901 . Area code: 406: FIPS code: 30-62230: GNIS feature ID: 2806617 [2]