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Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. 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.
These area codes serve an overlay complex that comprises much of the southeastern and southernmost portions of California. It includes Imperial, Inyo, and Mono counties, as well as portions of North County San Diego, Riverside, San Bernardino, Los Angeles and Kern counties. Area code 760 was created on March 22, 1997 in a split of area code 619 ...
This list may not reflect recent changes. List of California area codes; 0–9. Area codes 209 and 350; Area codes 213, 323, and 738; Area codes 310 and 424;
Area codes 805 and 820 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. The numbering plan area (NPA) includes most or all of the counties of San Luis Obispo , Santa Barbara , Ventura , and the southernmost portions of Monterey County . 805 was split from area code 213 in 1957, and area code ...
Not assignable; N11 code for non-emergency calls to local government, or to reach the city or county hall 312: Illinois (downtown Chicago) 1947: 1989: split to create 708; 1996: split to create 773; 2009: overlaid by 872; 313: Michigan (Dearborn, the Grosse Pointes, Detroit, and the latter's enclaves of Hamtramck and Highland Park) 1947: 1993 ...
On March 1, 1959, numbering plan area 415 was divided in a flash-cut (without permissive dialing period) in which the northern part of the numbering plan area (Solano County and north thereof) received area code 707, which was California's eighth area code (along with 213, 415, 916, 714, 408, 805, and 209), and the last new area code in the ...
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes.Area code 209 is shown in red. Area codes 209 and 350 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California.
Starting in the 1950s, Southern California experienced rapid expansion of telephone service, requiring area code 213 to be split five times by 1998. The first split became necessary in 1951, when most of the southern and eastern portion, including San Diego and most of Orange County , was assigned area code 714 .