Area Code 820
Area code 820 covers Camarillo and nearby cities including Oxnard, Thousand Oaks, Simi Valley in California, in the Pacific Time.
Is a call from 820 a scam? Who called me from 820?
Cities in area code 820
Camarillo, Oxnard, Thousand Oaks, Simi Valley, Santa Maria, Santa Barbara, San Luis Obispo, Lompoc, Atascadero, Goleta, Moorpark, Orcutt
Area codes by city
- Santa Barbara area codes
- Oxnard area codes
- San Luis Obispo area codes
- Ventura area codes
- Santa Maria area codes
- Simi Valley area codes
- Thousand Oaks area codes
- Paso Robles area codes
- Camarillo area codes
- Lompoc area codes
Carriers in area code 820
Area code 820 spans 90 prefixes, about 52% wireless. Top carriers: NEW CINGULAR WIRELESS PCS, LLC, ONVOY, LLC - CA, T-MOBILE USA, INC., FRACTEL, LLC. Look up the carrier for a 820 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
- 510 — Oakland
- 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
- 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.