510 Area Code
East Bay, California
Area code 510 is located in East Bay, California. It covers Oakland, Berkeley, and surrounding areas in the Pacific time zone (UTC-8). Administered by NANPA.
Where is area code 510?
Area code 510 is located in East Bay, California. It covers Oakland, Berkeley, and surrounding areas in the Pacific time zone (UTC-8).
Area code 510 is overlaid by area code 341. Both codes serve the same geographic region and require 10-digit dialing for local calls.
Cities Covered by Area Code 510
Area code 510 primarily serves the East Bay area of California. The exact coverage includes Oakland, Berkeley, and Fremont, along with surrounding communities and suburbs.
Time Zone
Pacific Time — UTC-8
Area code 510 operates in the Pacific Time Zone. When calling 510 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 510
Area code 510 was introduced in 1991 as a geographic area code serving East Bay, California. As demand for phone numbers grew, overlay code 341 was added to the same region, requiring 10-digit dialing for local calls. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.