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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. As of 2013, there were 1.7 million lines served by 47 carriers; all but two wireline ...
The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
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 ...
Montana's secondary system was established in 1942, [4] but secondary highways (S routes) were not signed until the 1960s. [1] S route designations first appeared on the state highway map in 1960 [5] and are abbreviated as "S-nnn". Route numbers 201 and higher are, with very few exceptions, exclusively reserved for S routes.
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]
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 prefix. A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the ...
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.