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Area code 406
0–9. Area code 406. Categories: Communications in Montana. Area codes in the United States by state.
List of North American Numbering Plan area codes
Area codes 208 and 986
cities, towns, townships, unincorporated communities, Indian reservations, census designated place. This is a list of the counties in the U.S. state of Montana. There are 56 counties in the state. Montana has two consolidated city-counties— Anaconda with Deer Lodge County and Butte with Silver Bow County. The portion of Yellowstone National ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
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 ...