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Area Code 820

Area code 820 is in California, USA , spanning 4 counties and serving 53 cities, including Oxnard, Ventura or Santa Maria; it currently uses 66 prefixes, assigned from 820-200-XXXX through 820-999-XXXX.

In service since June 30, 2018, area code 820 is an overlay Numbering Plan Area, part of overlay complex 805/820.

The current local time is .

820 area code location on a map

© OpenStreetMap contributors
For exact boundaries see official 820 area code map

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Locate any 820-NXX prefix:

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
820-217 Atascadero 06/06/2023
820-218 Lompoc 07/20/2023
820-219 Conejo 08/11/2023
820-220 Piru 08/11/2023
820-221 Santa Maria 10/26/2023
820-222 Camarillo 1/23/2019
820-223 Santa Barbara 12/07/2023
820-224 Nipomo 12/29/2023
820-225 Guadalupe 01/11/2024
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
820-502 Simi Valley 12/05/2023
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
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date.
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Cities in area code 820

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
  1. Listed above are most places served by USA area code 820. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. P stands for Pacific Time Zone (currently ).
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