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Area code 406. 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. As of 2013, there were 1.7 million lines served by 47 carriers; all but ...
0–9. Area code 406. Categories: Communications in Montana. Area codes in the United States by state or territory.
457. Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025[3] will overlay area code 318 by 2026. previously a fictitious area code assigned to identify Naked DSL / Dry Loop and dedicated data lines in Saskatchewan.
Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947. Today it only serves the greater Denver Metropolitan Area. Area codes 720 and 983 are overlay codes for today's 303 numbering plan area (NPA). Area code 719 serves Colorado Springs and southeastern Colorado.
Area code 207. Area code 207 is the sole telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Maine. Area code 207 was created as one of the original North American area codes in 1947. The numbering plan area retains its original boundaries, having never been split or overlaid. As of April 2020, area code 207 is ...
The original 801 area code, as shown on a 1952 map. Area codes 801 and 385 are telephone area codes in the North American Numbering Plan (NANP) serving Salt Lake City and the four surrounding counties of the Wasatch Front in north-central Utah. The numbering plan area comprises Davis, Morgan, Salt Lake, Utah, and Weber counties.
Area codes 208 and 986. Coordinates: 45°N 114°W. Area codes in Idaho. Area codes 208 and 986 are telephone area codes in the North American Numbering Plan for all of Idaho. Area code 208 is one of the 86 original area codes created by the American Telephone and Telegraph Company (AT&T) in 1947, and was Idaho's sole area code for seventy years.
Area code 218. Coordinates: 47°18′N 93°56′W. A map of Minnesota area codes. Area code 218 is a telephone area code in the North American Numbering Plan (NANP) for the northern part of the U.S. state of Minnesota. It is assigned to the largest of Minnesota's original two numbering plan areas (NPAs), although its geographical boundaries ...