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California · Pacific Time

510 Area Code: Oakland, CA

The 510 area code covers Oakland, Fremont, Berkeley and Hayward in California, on Pacific Time. Here is the current local time there, and whether you can legally place a solicitation call to a 510 number right now.

Current local time in the 510 area code

Current local time in the 510 area code

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Can you legally call a 510 number right now?

Checking…

DayLegal calling window in California
Sunday9:00 AM-9:00 PM
Monday9:00 AM-9:00 PM
Tuesday9:00 AM-9:00 PM
Wednesday9:00 AM-9:00 PM
Thursday9:00 AM-9:00 PM
Friday9:00 AM-9:00 PM
Saturday9:00 AM-9:00 PM

Windows shown are the stricter of the federal TCPA/TSR rule (8 a.m.-9 p.m. local) and California's own statute, in the called party's local time. Informational only, not legal advice. Check any number against the full TCPA calling hours calculator.

Area code 510 at a glance

StateCalifornia
Principal cityOakland
Time zonePacific Time
Overlay codes341
Weekday calling window9:00 AM-9:00 PM local
CountryUnited States

Cities in the 510 area code

These are the main population centers 510 serves. Smaller towns across the same California region share the code.

  • Oakland
  • Fremont
  • Berkeley
  • Hayward
  • Alameda

Calling 510 numbers legally

California is stricter than federal law. California prohibits automated and solicitation calls before 9 a.m. or after 9 p.m. local time (Public Utilities Code § 2875): a 9 a.m. start, stricter than the federal 8 a.m. Because the window follows the called party's local time, a 510 number is governed by California rules no matter where you are dialing from.

Ringless voicemail sits under the same rules as a live call, which is why TCPA compliance matters before you drop to a list. To check a whole list rather than one code, the phone number formatter tags every number with its state so you can segment sends by time zone.

Other California area codes

341Oakland209Stockton213Los Angeles279Sacramento310Santa Monica323Los Angeles350Concord408San Jose415San Francisco424Santa Monica442Oceanside530Chico

Or browse every US area code.

FAQ

510 area code questions

510 is a US telephone area code serving California, on Pacific Time. Its principal city is Oakland, and it also covers Fremont, Berkeley and Hayward. It shares the same territory with overlay code 341.
Area code 510 is in the state of California. It serves Oakland, Fremont, Berkeley and Hayward, and its principal city is Oakland.
The 510 area code is on Pacific Time (America/Los_Angeles). The panel above shows the current local time there, updated live.
It depends on the local time in California. California prohibits automated and solicitation calls before 9 a.m. or after 9 p.m. local time (Public Utilities Code § 2875): a 9 a.m. start, stricter than the federal 8 a.m. The live verdict above checks the current time against that window for you.
On weekdays, solicitation calls to California numbers are permitted 9:00 AM to 9:00 PM local time. Sunday hours are 9:00 AM to 9:00 PM.
Area code 510 shares its geography with area code 341. Overlay codes cover the same towns, which is why ten-digit dialing is required there: a 510 number and a 341 number can sit on the same street.
Not by itself. 510 is a legitimate California area code used by residents and businesses in Oakland and Fremont. Scammers do spoof caller ID to show a local area code, because people answer local numbers more often, so treat an unexpected call asking for payment or personal details with suspicion regardless of the prefix.

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