Forest Knolls, California Area Code
Forest Knolls, CA is officially utilizing two area codes which are area codes 415 and 628.
In addition to Forest Knolls, CA area code information read more details about area code 415, area code 628 and California area codes.
Forest Knolls, CA is located in Marin County and observes the Pacific Time Zone. View our Times by Area Code tool.
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