State
Area Code 510
Hayward, Richmond, Crockett, California
Local time now
…
Time zone
Pacific
Main cities
Hayward, Richmond, Crockett
Overlays
In service since
1991
When you can make sales calls to 510 numbers
| Every day | 8 AM – 9 PM (federal rule) |
In the called person's local time. Guidance, not legal advice.
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Other area codes in California
209213279310323341350357369408415424442530559562619626628650657661669707714738747760805818820831837840858909916925949951
Questions about area code 510
- Where is area code 510?
- Area code 510 is in California, covering Hayward, Richmond, Crockett.
- What time zone is area code 510?
- Pacific time.
- When can telemarketers call a 510 number?
- Federal rules allow sales calls from 8 AM to 9 PM local time.
- Is 510 a toll-free number?
- No. 510 is a regular area code for California. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.