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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, respectively. [1] As of July 2023, California has 38 active area codes.
Hayward is a city located in Alameda County, California, United States, in the East Bay subregion of the San Francisco Bay Area. With a population of 162,954 as of 2020, [10] Hayward is the sixth largest city in the Bay Area, and the third largest in Alameda County. [12] Hayward was ranked as the 36th most populous municipality in California.
The three area codes form an overlay numbering plan, and are also overlaid by area code 917 of a numbering plan area that comprises the entirety of New York City. Area code 212 is the original code assigned for all of the city in 1947. After a restriction of 212 to just Manhattan in 1985, area code 646 was assigned to Manhattan in 1999.
The additional demands for PCS and cellular phone numbers helped necessitate the 831/408 area code split, the 650/415 split, and the earlier 510/415 split. Part of the previous dialing plan included a mass calling prefix for radio station contests, introduced in the 1960s because some contests put unacceptable loads on the Bay Area's telephone ...
Location in Alameda County and the state of California. ... ZIP code: 94541, 94542. Area code(s) 510, 341: ... contracting with Hayward for emergency medical and ...
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In 1947, when 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: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. [1]