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Learn about the format, prefixes, and area codes of Canadian telephone numbers, as well as the history and regulation of the North American Numbering Plan. The country code for Canada is 1, which is used for international access and trunk prefix.
Learn about the overlay telephone area codes in southwestern Ontario, including the history, boundaries, and central office codes of each area code. Area code 226 was added in 2006 and covers parts of Brant, Haldimand, Norfolk, and Oxford counties.
Find out the telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks. The list is organized by world zones, from 1 to 9, with exceptions and details for each zone.
Learn about the history and usage of telephone exchange names or central office names, which were assigned to switching systems in different localities. Find out how they were dialed, displayed, and replaced by numeric systems in various countries.
Area code 216 is the original telephone area code for the city of Cleveland and most of its inner-ring suburbs in Cuyahoga County, Ohio. It is one of the four numbering plan areas of Ohio and has not been overlaid with a second area code since 1947.
Area code 263 is the third overlay code for the Montreal area in Quebec, Canada. It was added in October 2022 to relieve the number shortage in the 514/438 area, which covers most of the Island of Montreal and Île Perrot.
Learn how to dial international phone numbers from Australia and other countries using different prefixes. Find out the meaning of 0011, 000, 009 and other codes, and see the list of historic and current prefixes.
Learn about the history and current status of telephone area codes in eastern Ontario, Canada, including Ottawa and Gatineau. Find out how area codes 613, 343, and 753 were assigned, activated, and used in the region.