This is a list of area codes in California with service territory and installation dates. * 209 - Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. (Split from 916 on October 26, 1957) * 213 - Downtown Los Angeles (October 1947; surrounded by 323 since June 13, 1998) * 310 - Santa Monica, Malibu, Pacific Palisades, Compton, Torrance, Beverly Hills, Catalina Island; the southwestern portion of Los Angeles County. (Split from 213 on November 2, 1991; overlaid by 424 on August 26, 2006) * 323 - a ring around downtown Los Angeles, including the Hollywood and Eagle Rock districts of Los Angeles, Florence, Montebello and East Los Angeles. (Split from 213 on June 13, 1998) * 408 - San Jose, Sunnyvale, Gilroy, Morgan Hill, and Los Gatos;