Area code 820 is in California (CA), USA and some of the main locations it covers are Oxnard, Ventura, Santa Maria, etc. (jump to city list below).
In service since June 30, 2018, area code 820 is an overlay Numbering Plan Area, part of overlay complex 805/820 (overlaying NPAs cover the same area).
The current time for places served by area code 820 is 08:55:25 PM (Pacific Time Zone).
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 820-200 | Thousand Oaks | 6/25/2018 |
| 820-201 | Oxnard | 7/31/2018 |
| 820-202 | San Luis Obispo | 2/13/2020 |
| 820-203 | Atascadero | 3/11/2021 |
| 820-204 | Camarillo | 7/1/2021 |
| 820-205 | Newbury Park | 7/1/2021 |
| 820-206 | Paso Robles | 7/16/2021 |
| 820-207 | Camarillo | 7/29/2021 |
| 820-208 | Atascadero | 6/29/2022 |
| 820-209 | Gaviota | 2/16/2022 |
| 820-210 | Camarillo | 05/01/2023 |
| 820-212 | Ventura East | 6/1/2022 |
| 820-213 | Camarillo | 05/01/2023 |
| 820-214 | Newbury Park | 05/04/2023 |
| 820-215 | Newbury Park | 05/04/2023 |
| 820-216 | Arroyo Grande | 05/16/2023 |
| 820-222 | Camarillo | 1/23/2019 |
| 820-234 | Oxnard | 9/17/2020 |
| 820-280 | Los Alamos | 10/2/2019 |
| 820-288 | Ventura East | 1/27/2021 |
| 820-299 | Camarillo | 1/27/2021 |
| 820-300 | Guadalupe | 1/15/2019 |
| 820-333 | Thousand Oaks | 1/23/2019 |
| 820-336 | Guadalupe | 3/12/2021 |
| 820-345 | El Rio | 7/2/2020 |
| 820-346 | Arroyo Grande | 11/16/2020 |
| 820-348 | Oxnard | 1/11/2021 |
| 820-356 | Point Mugu | 1/13/2021 |
| 820-380 | Pismo Beach | 11/18/2022 |
| 820-386 | Simi Valley | 5/31/2022 |
| 820-400 | Parkfield | 1/15/2019 |
| 820-426 | Camarillo | 2/18/2022 |
| 820-432 | Newbury Park | 8/5/2021 |
| 820-444 | Newbury Park | 1/25/2019 |
| 820-465 | Oxnard | 7/10/2020 |
| 820-500 | Gaviota | 12/5/2019 |
| 820-529 | Piru | 12/17/2019 |
| 820-587 | Santa Barbara | 8/23/2021 |
| 820-600 | Pismo Beach | 12/5/2019 |
| 820-666 | San Luis Obispo | 1/24/2019 |
| 820-667 | Oxnard | 8/5/2021 |
| 820-732 | Ventura Central | 7/10/2020 |
| 820-758 | Santa Barbara | 7/10/2020 |
| 820-777 | Santa Paula | 1/22/2019 |
| 820-786 | Atascadero | 8/5/2021 |
| 820-799 | Camarillo | 2/23/2022 |
| 820-800 | Cayucos | 12/5/2019 |
| 820-822 | Oxnard | 9/22/2021 |
| 820-823 | Santa Ynez | 01/31/2023 |
| 820-837 | Oxnard | 1/10/2022 |
| 820-842 | Oakview | 11/4/2020 |
| 820-850 | Fillmore | 04/12/2023 |
| 820-888 | Simi Valley | 12/24/2018 |
| 820-899 | Santa Maria | 1/13/2021 |
| 820-900 | Bradley | 12/5/2019 |
| 820-946 | Santa Maria | 7/10/2020 |
| 820-999 | Oxnard | 1/22/2019 |
| City1 | County | Time2 |
|---|---|---|
| Arroyo Grande | San Luis Obispo | P |
| Atascadero | San Luis Obispo | P |
| Avila Beach | San Luis Obispo | P |
| Bradley | Monterey | P |
| Brandeis | Ventura | P |
| Buellton | Santa Barbara | P |
| Camarillo | Ventura | P |
| Cambria | San Luis Obispo | P |
| Carpinteria | Santa Barbara | P |
| Casmalia | Santa Barbara | P |
| Cayucos | San Luis Obispo | P |
| Creston | San Luis Obispo | P |
| Fillmore | Ventura | P |
| Goleta | Santa Barbara | P |
| Grover Beach | San Luis Obispo | P |
| Guadalupe | Santa Barbara | P |
| Harmony | San Luis Obispo | P |
| Lompoc | Santa Barbara | P |
| Los Alamos | Santa Barbara | P |
| Los Olivos | Santa Barbara | P |
| Los Osos | San Luis Obispo | P |
| Moorpark | Ventura | P |
| Morro Bay | San Luis Obispo | P |
| Newbury Park | Ventura | P |
| Nipomo | San Luis Obispo | P |
| Oak Park | Ventura | P |
| Oak View | Ventura | P |
| Oceano | San Luis Obispo | P |
| Ojai | Ventura | P |
| Oxnard | Ventura | P |
| Paso Robles | San Luis Obispo | P |
| Piru | Ventura | P |
| Pismo Beach | San Luis Obispo | P |
| Point Mugu Nawc | Ventura | P |
| Port Hueneme | Ventura | P |
| Port Hueneme Cbc Base | Ventura | P |
| San Luis Obispo | San Luis Obispo | P |
| San Miguel | San Luis Obispo | P |
| San Simeon | San Luis Obispo | P |
| Santa Barbara | Santa Barbara | P |
| Santa Margarita | San Luis Obispo | P |
| Santa Maria | Santa Barbara | P |
| Santa Paula | Ventura | P |
| Santa Ynez | Santa Barbara | P |
| Shandon | San Luis Obispo | P |
| Simi Valley | Ventura | P |
| Solvang | Santa Barbara | P |
| Somis | Ventura | P |
| Summerland | Santa Barbara | P |
| Templeton | San Luis Obispo | P |
| Thousand Oaks | Ventura | P |
| Ventura | Ventura | P |
| Westlake Village | Ventura | P |