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Country code. 1. International access. 011. Long-distance. 1. Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code (or exchange code), and a four-digit station or line code. This is represented as NPA NXX XXXX.
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes In the United States, the most-populous cities, such as New York City , Philadelphia , Boston , and Chicago initially implemented dial service with telephone numbers consisting of three letters and four digits ( 3L-4N ) according to a system developed by W ...
An area code is part of a telephone number in the United States, Canada, and the Caribbean. It is the part of the telephone number after the county code. For example, in the number 1-562-555-5555, the 1 is the country code (for the United States), and 562 is the area code. An area code is typically assigned to a state, city or region.
In December 1930, New York City became the first city in the United States to adopt the two-letter and five-number format (2L-5N), which became the standard after World War II, when the Bell System administration designed the North American Numbering Plan to prepare the United States and Canada for Direct Distance Dialing (DDD), and began to ...
Telephone numbers in the Americas. 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 ...
Toll-free and premium numbers. Non-geographic toll-free telephone numbers (800, 833, [3] 844, 855, 866, 877, 888) and premium-rate telephone numbers (900) are allocated centrally by the NANP Administrator. Calls to telephone numbers with the central office code 976 are billed as expensive premium calls.
