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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.
On June 30, 1998, the NANPA approved a request by the California Public Utilities Commission for a two-phase three-way split of 619 such that the first phase would introduce the new 858 area code to northwest San Diego County on June 12, 1999, after which the southern and eastern parts of the county would be split off into a new 935 area code ...
On December 31, 2005, customers began dialing 1 + area code + seven-digit number whenever a call is placed by a caller in the 310 or 424 area code to any other area code, including 310 to 424 or 424 to 310. After July 26, 2006, customers were required to use the new 1 + area code + seven-digit number dialing procedure for all calls, although ...
California (Stockton, Modesto, Merced, Tracy, San Andreas, and a part of central California extending into central Yosemite National Park) 1958: split of 916; 1998: split to create 559; 2022: overlaid by 350; 210: Texas (San Antonio metropolitan area) 1992: split of 512; 1997: split three ways to create 830 and 956; 2017: overlaid by 726; 211
Area code 415 was assigned to central California, south of area code 916, and north of area code 213. It stretched from Sacramento in the north to Bakersfield in the south. [2] In 1950, the boundaries of the numbering plan area were redrawn to produce a division of the northern and central parts along a north–south-running dividing line.
Large numbers of calls would otherwise have overloaded switching equipment causing slow dial tone and blocked long-distance circuits. A patchwork quilt of electromechanical switching equipment handled San Jose calls between 1949 and the 1980s. There were about eight Western Electric Crossbar switches, at least one Number 1 and mostly Number 5.
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The area code had telephone numbers assigned for the central office code 988, which was designated as a nationwide three-digit dialing code for the 988 Suicide & Crisis Lifeline in 2022. This created a conflict for all NPAs with central office codes of 988 that still permitted seven-digit dialing , [ 1 ] requiring all such NPAs to transition to ...
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