Oceanside, CA utilizes an area code overlay in which area codes 442 and 760 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Oceanside, CA area code information view area codes 442 and 760 details and California area codes.
Oceanside, CA is located in San Diego County and observes the Pacific Time Zone. View our Times by Area Code tool.