Area Code 510
Area code 510 covers Oakland and nearby cities including Fremont, Hayward, Berkeley in California, in the Pacific Time.
Is a call from 510 a scam? Who called me from 510?
Cities in area code 510
Oakland, Fremont, Hayward, Berkeley, Richmond, San Leandro, Alameda, Union City, Newark, Castro Valley, El Cerrito, San Lorenzo
Area codes by city
- Oakland area codes
- Berkeley area codes
- Fremont area codes
- Hayward area codes
- Union City area codes
- Alameda area codes
- San Leandro area codes
Carriers in area code 510
Area code 510 spans 786 prefixes, about 39% wireless. Top carriers: PACIFIC BELL, T-MOBILE USA, INC., METROPCS, INC., ONVOY, LLC - CA. Look up the carrier for a 510 number.
Other California area codes
- 209 — Stockton
- 213 — Los Angeles
- 279 — Sacramento
- 310 — Compton
- 323 — Los Angeles
- 341 — Oakland
- 350 — Stockton
- 357 — Fresno
- 369 — Santa Rosa
- 408 — San Jose
- 415 — San Francisco
- 424 — Compton
- 442 — Victorville
- 530 — Marysville
- 559 — Fresno
- 562 — Long Beach
- 619 — San Diego
- 626 — Alhambra
- 628 — San Francisco
- 650 — Palo Alto
- 657 — Anaheim
- 661 — Bakersfield
- 669 — San Jose
- 707 — Santa Rosa
- 714 — Anaheim
- 738 — Los Angeles
- 747 — San Fernando
- 760 — Oceanside
- 805 — Oxnard
- 818 — Van Nuys
- 820 — Camarillo
- 831 — Salinas
- 837 — Redding
- 840 — Pomona
- 858 — San Diego
- 909 — Ontario
- 916 — Sacramento
- 925 — Concord
- 949 — Irvine
- 951 — Riverside
Nearby area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.