820 Area Code
California, USA
Local time now · Pacific Time
12:43 AM
Area code 820 is in California, USA, serving Oxnard, Thousand Oaks, Simi Valley and Santa Maria. It uses Pacific Time — the time there now is 12:43 AM. 805 is an overlay for the same area, so local calls need 10-digit dialing. In service since 2018.
| Area code | 820 |
|---|---|
| Location | California, USA |
| Major cities | Oxnard, Thousand Oaks, Simi Valley, Santa Maria, Santa Barbara, Camarillo, San Luis Obispo, Lompoc |
| Time zone | Pacific Time |
| Overlay codes | 805 |
| In service since | 2018 |
Other area codes in California
209213279310323341350357369408415424442510530559562619626628650657661669707714738747760818831837840858909916925949951
Time zone converterAll area codes
Frequently asked questions
Where is area code 820?
California, USA — including Oxnard, Thousand Oaks, Simi Valley, Santa Maria and Santa Barbara.
What time zone is area code 820?
Pacific Time.
How do I call a 820 number from abroad?
Dial your international access code, then 1 (the country code), then 820 and the 7-digit number — for example +1 820 555 0100. From the UK or India dial 00 1 820 …; from Bangladesh 00 1 820 … .
Is a call from 820 a scam?
Not by itself — 820 is an ordinary geographic area code in California. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.