510 Area Code: Oakland CA Location, Time Zone & Scam Check (2026)
The 510 area code covers the East Bay — Oakland, Berkeley, Fremont, Hayward, and Richmond in the San Francisco Bay Area. Learn about the Black Panthers' birthplace, UC Berkeley's 16 elements, Tesla's Fremont factory, and how to call the East Bay internationally.
The 510 area code covers the East Bay region of the San Francisco Bay Area — Oakland, Berkeley, Fremont, Hayward, Richmond, and surrounding cities. Created in 1991 as a split from the legendary 415, it serves over 1.5 million people in Alameda and Contra Costa counties. Where the Black Panther Party was founded, UC Berkeley discovered 16 chemical elements, and Tesla now builds over 560,000 cars a year.
Quick Facts
- Location: Oakland, Berkeley, Fremont, Hayward, Richmond, Alameda
- Time Zone: Pacific Time (PT) — UTC-8 / UTC-7 DST
- Created: September 2, 1991 (split from 415)
- Overlay: 341 (July 22, 2019) — mandatory 10-digit dialing
- Population: ~1.5 million people
- Cultural: 510 Day celebrated every May 10th since 2016
Is 510 a Scam Area Code?
No — 510 is a legitimate area code serving over 1.5 million people in the East Bay. California ranks among the top states for robocall complaints. Use our Spam Number Checker to verify unknown callers.
How to Call 510 Internationally
Dial exit code + 1 + 510 + 7-digit number. On mobile: +1-510-XXX-XXXX. Use Best Time to Call for Pacific Time info. Look up any code with our Area Code Lookup. Check our rates.
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