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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.
However, all area codes assigned until 1995 had none other than the digits 0 and 1 in this position. The eight codes of the form N11 (N=2–9) were reserved as service codes. The easily recognizable codes of the form N00 were available in the numbering plan, but were not initially included in assignments. [7]
Congo (Kinshasa): Independence: June 30, 1960 (from Belgium). Formerly called Zaire until name change in 1997. 1 519 51901 Benin Africa Benin Independent State in the World Porto-Novo BJ 1960-08-01 The territory became a French Colony in 1872 and achieved independence on 1 August 1960, as the Republic of Benin. Formerly known as Dahomey. 1 521 ...
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 ...
This is a list of future area codes in the North American Numbering Plan (NANP) that are in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning Letters.
This necessity was more common as interchangeable central office codes were introduced in more area codes. In the late 1980s, Bellcore, which administered the North American Numbering Plan, made it mandatory to implement interchangeable central office codes before area code relief would be approved.
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, or 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
Each NPA was identified by a three-digit area code used as a prefix to each local telephone number. The United States received seventy-seven area codes, and Canada nine. The initial system of numbering plan areas and area codes was expanded rapidly during the ensuing decades, and established the North American Numbering Plan (NANP).
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