Alameda, California Area Code
Alameda, CA is officially utilizing an area code overlay in which area codes 510 and 341 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Alameda, CA area code information read more about area codes 510 and 341 details and California area codes.
Alameda, CA is located in Alameda County and observes the Pacific Time Zone. View our Times by Area Code tool.
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