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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.
0–9. Area code 406. Categories: Communications in Montana. Area codes in the United States by state.
FIPS code [1] County seat [2] Est. [2] Origin Etymology License plate prefix [3] [4] Population [5] Area Map Beaverhead County: 001: Dillon: February 2, 1865: Original County: Beaverhead Rock in the Jefferson River, which is shaped like a beaver's head. [6] 18 9,885: 5,543 sq mi (14,356 km 2) Big Horn County: 003: Hardin: January 13, 1913 ...
This is a list of telephone numbering plan areas (NPAs) and area codes of Minnesota . Area code. Location. 218. northern portion of the state. 320. about the central third of the state except for the greater Minneapolis-Saint Paul area. 507/924. southern third of the state, overlay with 924 beginning August 2024.
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.
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.
971: An overlay of area code 503. Until 2008, 971 was a concentrated overlay, meaning it was only present in some parts of the 503 area. Today it is a standard overlay. 458: An overlay of area code 541. Under the original North American Numbering Plan of 1947, area code 503 covered all of Oregon. Area code 541 was split off in 1995, the 971 ...