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Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
This page was last edited on 24 December 2023, at 10:18 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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.
The state of Iowa is covered by five area codes. The map to the right is clickable, click on any of the area codes on the map to go to the area code for that region or use the text links below. The map to the right is clickable, click on any of the area codes on the map to go to the area code for that region or use the text links below.
List of Maine area codes; List of Maryland area codes; List of Massachusetts area codes; List of Michigan area codes; List of Minnesota area codes; List of Mississippi area codes; List of Missouri area codes; List of Montana area codes
The U.S. state of Alabama is served by six area codes. When the North American Numbering Plan was first defined in 1947, Alabama was a single numbering plan area (NPA), with area code 205. This configuration existed until 1995 when area code 334 was added for the southeastern part of the state. In 1998, area code 256 was assigned for northern ...
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes.Area codes 408 and 669 are shown in red. Area codes 408 and 669 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of California.
The state of Arkansas is served by four telephone area codes: 479, 501, 870, and 327. In 1947, when the North American Numbering Plan was first implemented, the entire state of Arkansas was assigned the area code 501. With Arkansas being relatively sparsely populated, this arrangement worked well until 1997, when the phone numbers in area code ...