San Mateo, California Area Code
San Mateo, CA Area Codes are
San Mateo, CA is officially utilizing 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.
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