California Area Code Information
California Area Codes
(209 and 350) - (310 and 424)
(341 and 510) - (369 and 707)
(415 and 628) - (408 and 669)
(714 and 657) - (760 and 442)
(818 and 747) - (820 and 805)
(840 and 909) - (916 and 279)
California is currently using thirty-eight area codes, fourteen of which were created as area code overlays. Area Code 350 is the most recent area code introduced. It was implemented as an overlay of area code 209 effective November 28, 2022.
California originally had three area codes, 213, 415, and 916 when the numbering system was established in 1947. By 1951, just four years later, California experienced sufficient growth in population and telephone use to need an additional area code. To meet this increase in demand area code 213 was split in 1951 to form area code 714. During the 1950's California introduced five new area codes. Throughout the 1960s and the 1970s no new area codes were introduced. Two area codes were put into service in the 1980s and from 1991-1999 California put fifteen area codes into service. All fifteen were the result of area code splits. Between 2004 and 2019 ten new area codes were introduced of which nine are area code overlays.
Changes and History of California Area Codes:
01/01/1947
Area code 213 was put into service. In 1951 area code 213 was split to form area code 714. In 1957 area code 213 was split to form area code 805. In 1984 area code 213 was split to form area code 818. In 1991 area code 213 was split to form area code 310. In 1998 area code 213 was split to form area code 323.
01/01/1947
Area code 415 was put into service. In 1959 area code 415 was split to form area codes 408 and 707. In 1991 area code 415 was split to form area code 510. In 1997 area code 415 was split to form area code 650.
01/01/1947
Area code 916 was put into service. In 1958 area code 916 was split to form area code 209. In 1997 area code 916 was split to form area code 530.
01/01/1951
Area code 714 was put into service. Area code 714 was created from a split of area code 213. In 1982 area code 714 was split to form area code 619. In 1992 area code 714 was split to form area code 909. In 1998 area code 714 was split to form area code 949. In 1999 area code 714 was overlaid with area code 657.
01/01/1957
Area code 805 was put into service. Area code 805 was created from a split of area code 213. In 1999 area code 805 was split to form area code 661.
01/01/1958
Area code 209 was put into service. Area code 209 was created from a split of area code 916. In 1998 area code 209 was split to form area code 559.
01/01/1959
Area code 408 was put into service. Area code 408 was created from a split of area code 415. In 1998 area code 408 was split to form area code 831.
01/01/1959
Area code 707 was put into service. Area code 707 was created from a split of area code 415.
01/01/1982
Area code 619 was put into service. Area code 619 was created from a split of area code 714. In 1997 area code 619 was split to form area code 760. In 1999 area code 619 was split to form area code 858.
01/07/1984
Area code 818 was put into service. Area code 818 was created from a split of area code 213. In 1997 area code 818 was split to form area code 626. In 2009 area code 818 was overlaid with area code 747.
09/02/1991
Area code 510 was put into service. Area code 510 was created from a split of area code 415. In 1998 area code 510 was split to form area code 925.
11/02/1991
Area code 310 was put into service. Area code 310 was created from a split of area code 213. In 1997 area code 310 was split to form area code 562. In 2006 area code 310 was overlaid with area code 424.
11/14/1992
Area code 909 was put into service. Area code 909 was created from a split of area code 714. In 2004 area code 909 was split to form area code 951.
01/25/1997
Area code 562 was put into service. Area code 562 was created from a split of area code 310.
03/22/1997
Area code 760 was put into service. Area code 760 was created from a split of area code 619. In 2009 area code 760 was overlaid with area code 442.
06/14/1997
Area code 626 was put into service. Area code 626 was created from a split of area code 818.
08/02/1997
Area code 650 was put into service. Area code 650 was created from a split of area code 415.
11/01/1997
Area code 530 was put into service. Area code 530 was created from a split of area code 916.
03/14/1998
Area code 925 was put into service. Area code 925 was created from a split of area code 510.
04/18/1998
Area code 949 was put into service. Area code 949 was created from a split of area code 714.
06/13/1998
Area code 323 was put into service. Area code 323 was created from a split of area code 213.
07/11/1998
Area code 831 was put into service. Area code 831 was created from a split of area code 408.
11/14/1998
Area code 559 was put into service. Area code 559 was created from a split of area code 209.
02/13/1999
Area code 661 was put into service. Area code 661 was created from a split of area code 805.
06/12/1999
Area code 858 was put into service. Area code 858 was created from a split of area code 619.
07/17/2004
Area code 951 was put into service. Area code 951 was created from a split of area code 909.
08/26/2006
Area code 424 was put into service. Area code 424 is an overlay of area code 310.
09/23/2008
Area code 657 was put into service. Area code 657 is an overlay of area code 714.
05/18/2009
Area code 747 was put into service. Area code 747 is an overlay of area code 818.
11/21/2009
Area code 442 was put into service. Area code 442 is an overlay of area code 760.
11/20/2012
Area code 669 was put into service. Area code 669 is an overlay of area code 408.
03/21/2015
Area code 628 was put into service. Area Code 628 is an overlay of area code 415.
03/10/2018
Area code 279 was put into service. Area Code 279 is an overlay of area code 916.
06/30/2018
Area code 820 was put into service. Area code 820 is an overlay of area code 805.
07/22/2019
Area code 341 was put into service as an overlay of area code 510.
02/23/2021
Area code 840 was put into service as an all services overlay of area code 909.
11/28/2022
Area code 350 was put into service as an overlay of area code 209.
02/01/2023
Area code 369 was put into service as an overlay of area code 707.
11/01/2024
Area code 738 will be put into service as an overlay of area codes 213 and 323.
01/31/2025
Area code 837 will be put into service as an overlay of area code 530.
03/26/2025
The California Public Utilities Commission has approved area code 357 as an all services overlay of area code 559. Area code 357 will only become available to subscribers when all assignable central office codes in area code 559 are assigned. The earliest activation date for area code 357 will be March 26, 2025. Ten digit dialing (area code + seven digit number) will be necessary in the 357/559 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
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