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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. This is represented as NPA NXX XXXX. [1]
The last line of the address block area should include only the complete country name (no abbreviations) written in uppercase letters. Mail to the US often omits the country name, and vice versa, given that no postal codes nor provincial/territorial/state abbreviations duplicate one another.
Area codes 905, 289, 365, and 742 are telephone area codes in the North American Numbering Plan (NANP) for the Golden Horseshoe region that surrounds Lake Ontario in Southern Ontario, Canada. The numbering plan area (NPA) comprises (clockwise) the Niagara Peninsula , the city of Hamilton , the regional municipalities of Halton , Peel , York ...
0–9. Area codes 204, 431, and 584; Area code 250; Area codes 306, 639, and 474; Area codes 418, 581, and 367; Area code 403; Area codes 416, 647, and 437
It was almost completely surrounded by Ontario's other area code, 613. Ontario and Quebec were the only provinces to be assigned multiple area codes at the inception of the continent-wide telephone numbering plan. Area code 416 has been split twice. The first came in 1953, when the western portion of 416 (including Kitchener) was combined with ...
Area codes 519, 226, 548, and 382 are overlay telephone area codes in the North American Numbering Plan (NANP) for most of southwestern Ontario. Area code 519 was the initial code of the numbering plan area (NPA). It was created in 1953 from the western portion of area code 416 and the southwestern portion of 613.
In 1957, the vast northwestern portion of 613 was combined with the northern portion of 519 to receive area code 705. Since 1957, 613 covers only eastern Ontario, an area extending from Brighton and Deep River eastward to Saint Regis, Quebec. Ottawa and its twin city in Quebec, Gatineau, fall on the boundary between 613 and Quebec's area code 819.
Area code 416, in the southern part of the province, was split in 1953 to form area code 519 in the western part of the province. In 1956, area code 705 was created from portions of the 613 and 519 numbering plan areas and served nearly all of Ontario north and west of the Golden Horseshoe . [ 1 ]