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An area code of three digits dialed after the country code determines the area served in the United States and its territories, Canada, and much of the Caribbean. Zone 2 uses two 2-digit codes (20, 27) and eight sets of 3-digit codes (21x–26x, 28x, 29x), mostly to serve Africa , but also Aruba , Faroe Islands , Greenland and British Indian ...
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.
Dependency and Area of Special Sovereignty United States 1950-01-01 1968-05-31 Retired. Area is now under WAC 736. The United States returned control of the islands to Japan in June 1968. (No airports in this WAC.) 1 706 70601 Myanmar Far East Burma Independent State in the World Rangoon MM 1950-01-01 1 707 70701 British Indian Ocean Territory
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. Original North American area codes
The prefixes in the Americas start with one of 1,2,5. All countries in the Americas use codes that start with "5", with the exception of the countries of the North American Numbering Plan, such as Canada and the United States, which use country code 1, and Greenland and Aruba with country codes starting with the digit "2", which mostly is used by countries in Africa.
The 0–99 range of area codes in Mexico serve the country's three largest cities. Area code 33 serves the Metropolitan area of Guadalajara, Jalisco, area code 55 and area code 56 serve the Metropolitan area of Mexico City (Mexico State and the CDMX), and area code 81 serves the Metropolitan area of Monterrey, Nuevo León.
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Mexican participation was planned, [11] but implementation stopped after three area codes (706, 903, and 905) had been assigned, and Mexico opted for an international numbering format, using country code 52. [12] The area codes in use were subsequently withdrawn in 1991. [13]