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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 ...
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.
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]
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]
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.
Flathead County is a county located in the U.S. state of Montana. At the 2020 census, its population was 104,357, [1] making it the state's fourth most populous county. Its county seat is Kalispell. [2] Its numerical designation (used in the issuance of license plates) is 7. Its northern border is on the state's north border, making it ...
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 ...