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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.
Lists of North American area codes. The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.
As a result, prefixes were duplicated in both area codes, which counteracted much of the benefit of the division, with only 200 of 700 prefixes in area 612 transferring entirely to area 651. In less than two years, area code 612 again exhausted its supply of telephone numbers, and necessitated a three-way division in 2000, creating the new area ...
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.
Minnesota numbering plan areas and area codes. 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.
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 ...
When three-digit codes share a common leading pair, the shared prefix is marked by an arrow, (↙ ) pointing down and left to the three-digit codes. Unassigned codes are denoted by a dash (—). Countries are identified by ISO 3166-1 alpha-2 country codes; codes for non-geographic services are denoted by two asterisks (**).
This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each. Since 1995, several relief actions in form of area code splits and overlays have expanded the list of area
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