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In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state ...
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 ...
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.
Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in Marin County (across the Golden Gate), and the northeast corner of San Mateo County in the U.S. state of California. Area code 415 was one of the eighty-six original North American area codes ...
Area codes 619 and 858 are telephone area codes in the North American Numbering Plan (NANP) for most of San Diego County in the U.S. state of California. Area code 619 was created by a split of area code 714 in 1982. In 1999, a part of the 619 numbering plan area was assigned area code 858 in northwest San Diego County.
Area codes 408 and 669 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of California. The numbering plan area comprises most of Santa Clara County and Northern Santa Cruz County , and includes Gilroy , Morgan Hill , Saratoga , Los Gatos , Monte Sereno , Milpitas , Sunnyvale , Santa Clara , Cupertino ...
Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.
Area codes 818 and 747 are telephone area codes in the North American Numbering Plan (NANP) for the San Fernando Valley region of Los Angeles County in the U.S. state of California. Area code 818 was created in a split from area code 213 on January 7, 1984.