what area code is 858
Area code 858 is a Southern California area code that covers the Northern part of San Diego and its surrounding areas. California has area codes of 209, 213, 310, 323, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951.The following map shows the coverage of 858 area code. The coverage area is shown in green.Area code map of the entire U.S. The USA.com website and domain are privately owned and are not operated by or affiliated with any government or municipal authority.alifornia has area codes of 209, 213, 310, 323, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951. The following map shows the coverage of 858 area code. The coverage area is shown in green.