820 area code is a telephone area code in the North American Numbering Plan (NANP) for western San Luis Obispo and Santa Barbara counties and the northern portion of Ventura county in western central California. The area code was created in 2018.
| Area Code | 820 |
|---|---|
| Major City | Oxnard |
| Service Date | 06/30/2018 |
| Time Zone | Pacific |
| Overlay Complex | 805/820 |
| Location | California (CA) |
| Country | United States |
Some of the cities served by area code 820 include Oxnard, Simi Valley, Thousand Oaks, San Buenaventura (Ventura), Santa Maria, Santa Barbara, Camarillo, San Luis Obispo, Lompoc and more.
| Area code | City/Town | County |
|---|---|---|
| 820 | Arroyo Grande | San Luis Obispo |
| 820 | Atascadero | San Luis Obispo |
| 820 | Avila Beach | San Luis Obispo |
| 820 | Bradley | Monterey |
| 820 | Brandeis | Ventura |
| 820 | Buellton | Santa Barbara |
| 820 | Camarillo | Ventura |
| 820 | Cambria | San Luis Obispo |
| 820 | Carpinteria | Santa Barbara |
| 820 | Casmalia | Santa Barbara |
| 820 | Cayucos | San Luis Obispo |
| 820 | Creston | San Luis Obispo |
| 820 | Fillmore | Ventura |
| 820 | Goleta | Santa Barbara |
| 820 | Grover Beach | San Luis Obispo |
| 820 | Guadalupe | Santa Barbara |
| 820 | Harmony | San Luis Obispo |
| 820 | Lompoc | Santa Barbara |
| 820 | Los Alamos | Santa Barbara |
| 820 | Los Olivos | Santa Barbara |
| 820 | Los Osos | San Luis Obispo |
| 820 | Moorpark | Ventura |
| 820 | Morro Bay | San Luis Obispo |
| 820 | Newbury Park | Ventura |
| 820 | Nipomo | San Luis Obispo |
| 820 | Oak Park | Ventura |
| 820 | Oak View | Ventura |
| 820 | Oceano | San Luis Obispo |
| 820 | Ojai | Ventura |
| 820 | Oxnard | Ventura |
| 820 | Paso Robles | San Luis Obispo |
| 820 | Piru | Ventura |
| 820 | Pismo Beach | San Luis Obispo |
| 820 | Point Mugu Nawc | Ventura |
| 820 | Port Hueneme | Ventura |
| 820 | Port Hueneme Cbc Base | Ventura |
| 820 | San Luis Obispo | San Luis Obispo |
| 820 | San Miguel | San Luis Obispo |
| 820 | San Simeon | San Luis Obispo |
| 820 | Santa Barbara | Santa Barbara |
| 820 | Santa Margarita | San Luis Obispo |
| 820 | Santa Maria | Santa Barbara |
| 820 | Santa Paula | Ventura |
| 820 | Santa Ynez | Santa Barbara |
| 820 | Shandon | San Luis Obispo |
| 820 | Simi Valley | Ventura |
| 820 | Solvang | Santa Barbara |
| 820 | Somis | Ventura |
| 820 | Summerland | Santa Barbara |
| 820 | Templeton | San Luis Obispo |
| 820 | Thousand Oaks | Ventura |
| 820 | Ventura | Ventura |
| 820 | Westlake Village | Ventura |