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Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 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.
In the group of original North American area codes, established in 1947, all of the Chicago metropolitan area was part of numbering plan area 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618. In 1957, area code 815 was split for the assignment of area code 309 to western central Illinois.
The telephone number consists of a three-digit central office (or exchange) code and a four-digit station number. The combination of an area code and the telephone number serves as a destination routing address in the public switched telephone network (PSTN).
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. Expanding this technology for national use required a ...
Area code 864 is a telephone area code in the North American Numbering Plan (NANP) for the western third of the U.S. state of South Carolina. The numbering plan area (NPA) comprises the areas of Greenville, Spartanburg, Anderson, and twelve surrounding counties.
Area codes 860 and 959 are telephone area codes in the North American Numbering Plan in the U.S. state of Connecticut. They are arranged in an overlay plan that covers most of the state, except its southwest, which uses area codes 203 and 475 .
Having telephone service to the United States as early as 1936, it was not until 1962 that Jamaica had a high capacity link for dial service to the US network, which was operated as part of the NANP numbering plan area 809. 809 was designated for parts of the Caribbean region in 1958, and was divided in the 1990s for service to individual countries. Area code 876 was created on 1 May 1997 for ...
List of dialling codes in New Zealand. Country calling code: +64. International call prefix: 00. Trunk prefix: 0. New Zealand's telephone numbering plan divides the country into a large number of local calling areas. When dialling, if you wish to call a person in another local calling area, you must dial the trunk prefix followed by the area code.