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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.
Most areas permit local calls as 1+10D except for Texas, Georgia, and some jurisdictions in Canada which require that landline callers know which numbers are local and which are toll, dialing 10D for local calls and 1+10D for all toll calls.
Canada. Canada is a member of the North American Numbering Plan, but administers its numbering resources individually, under guidance from the NANP Administrator. The Canadian government has stated on its Language Portal of Canada that telephone numbers are to be written with a hyphen between each sequence, as follows: 1-NPA-NXX-XXXX or NPA-NXX ...
Area codes 416, 647, and 437 are telephone area codes in the North American Numbering Plan (NANP) for the city of Toronto, Ontario, Canada. Area code 416 is one of the original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947.
E.164 numbers were originally defined for use in the worldwide public switched telephone network (PSTN). The early PSTN collected routing digits from users (e.g. on a dial pad), signaled those digits to each telephony switch, and used the numbers to determine how to ultimately reach the called party.
Area code 780 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of Alberta. The numbering plan area comprises the northern two thirds of the province, including the Edmonton area.
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The American Telephone and Telegraph Company (AT&T) announced a nationwide numbering plan in 1947, which divided the United States and Canada into 86 numbering plan areas and assigned a unique area code to each. All area codes had a zero or one as the middle digit.
Telephone numbering plans are defined in each of the administrative regions of the public switched telephone network (PSTN) and in private telephone networks. For public numbering systems, geographic location typically plays a role in the sequence of numbers assigned to each telephone subscriber.
In Canada, which shares the same country code with the U.S. (due to Bell Canada's previous ownership by the U.S.-based Bell System), regulation is mainly through the Canadian Radio-television and Telecommunications Commission.