San Gregorio, California Area Code
San Gregorio, CA Area Codes are
San Gregorio, CA is officially utilizing one area code which is area code 650.
In addition to San Gregorio, CA area code information read more about area code 650 details and California area codes.
San Gregorio, CA is located in San Mateo County and observes the Pacific Time Zone. View our Times by Area Code tool.
Select Any California City or Town Alphabetically
Area Codes Look Up By State and City
Area Codes Look Up in Surrounding Places
