La Jolla, CA is currently using one area code which is area code 858. Area code 858 was created from a split of area code 619 and put into service on June 12, 1999.
In addition to La Jolla, CA area code 858 serves the northern suburbs of San Diego and areas in the northern parts of the city of San Diego, including the larger cities and communities of Del Mar, La Jolla, Pacific Beach, Poway, Rancho Bernardo, and Solana Beach in addition to many smaller communities within the service area.
La Jolla, CA is located in San Diego County and observes the Pacific Time Zone. View our Times by Area Code tool.