San Lorenzo, California Area Code

San Lorenzo, CA Area Codes are

510 and 341

San Lorenzo, CA is officially utilizing an area code overlay in which area codes 510 and 341 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to San Lorenzo, CA area code information read more about area codes 510 and 341 details and California area codes.

San Lorenzo, CA is located in Alameda County and observes the Pacific Time Zone. View our Times by Area Code tool.

California Area Code Map