Cobb, CA is currently using one area code which is area code 707. Area code 707 was created from a split of area code 415 and put into service on January 1, 1959.
In addition to Cobb, CA area code 707 serves most of northwest California including the larger cities and communities of Benicia, Eureka, Fairfield, Napa, Petaluma, Rohnert Park, Santa Rosa, Suisun City, Vacaville, Vallejo, and Windsor, in addition to many smaller communities within the service area.
Cobb, CA is located in Lake County and observes the Pacific Time Zone. View our Times by Area Code tool.