San Mateo, California Area Code

San Mateo, CA Area Codes are

San Mateo, CA is currently using one area code which is area code 650.

In addition to San Mateo, CA area code information read more about area code 650 details and California area codes.

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

California Area Code Map