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No area codes have been split in Canada since 1999. Area code 438 was considered for overlaying 450 as well, but a later decision determined instead that 579 would be the overlay code. [4] In February 2017, area code 263 was reserved as the third area code in the region, and was placed in service on October 22, 2022. [5]
A new overlay area code, 437, started operation on March 25, 2013. [6] [7] That effectively allocates 24 million numbers to a city of 2.5 million people. Area code 942 is scheduled for addition to the 416/647/437 overlay on April 26, 2025. [8] Area code 387 has been reserved for Toronto's future use.
Despite Quebec City's rapid growth, by the turn of the millennium, area code 418 was the last of Quebec and Ontario's original four area codes not to have been split. By 2006, however, area code 418 was on the brink of exhaustion because of Canada's system of number allocation.
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. [1]
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.
Area code 450 entered service in 1998. The numbering plan area completely surrounds area code 514, which was confined to the Island of Montreal and a few surrounding islands, and so it is one of the six pairs of "doughnut area codes" in the numbering plan, and the only one in Canada (Toronto's area code 416 also borders Lake Ontario).
The numbering plan area surrounds the city of Toronto (area codes 416/647/437), leading locals to refer to the primarily suburban cities surrounding Toronto as "the 905" or "905 belt". It is bound by the 519/226/548/382 overlay area in the west, 705/249/683 in the north, 613/343/753 in the east, and Western New York State's 716/624 area on the ...
Area code 819 thus bordered area code 613 and the new area code 705 in Ontario, area code 418 in the east and the north of Quebec, and the remainder of area code 514 in the south of Quebec. When telephone service was introduced in the eastern Northwest Territories (most of which is now the territory of Nunavut , created in 1999), in Frobisher ...