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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 ...
Map of the United States with Montana highlighted. Montana is a state located in the Western United States.According to the 2020 United States Census, Montana is the 8th least populous state with 1,084,225 inhabitants but the 4th largest by land area spanning 145,545.80 square miles (376,961.9 km 2) of land. [1]
An asterisk (*) indicates that the listed place name is the "default" place name for all addresses in the prefix, that is, that addresses for all ZIP codes beginning with that three-digit prefix will have that place name in the city portion of the address (example: 23219, 23224, and 23294 will all have "Richmond, Virginia" addresses, even if ...
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]
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 ...
Lists of United States area codes This page was last edited on 10 April 2015, at 20:25 (UTC) . Text is available under the Creative Commons Attribution-ShareAlike License 4.0 ; additional terms may apply.
this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997. was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled. 2009: overlaid by 442. 761.
ZIP code Lower Upper Babb: 1 Glacier County: 59411 Bainville: 1 Roosevelt County: 59212 Baker: 1 Fallon County: 59313 Ballantine: 1 Yellowstone County: 59006 Bannack: 1 Beaverhead County: Basin: 1 Jefferson County: 59631 Bearcreek: 1 Carbon County: 59007 Belfry: 1 Carbon County: 59008 Belgrade: 1 Gallatin County: 59714 Belt: 1 Cascade County ...