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820 Area Code 🌍☎️

Area Code Profile · California

The 820 area code is located in the state of California and covers 79 cities, serving a total population of approximately 1,367,127. Major cities covered by the 820 area code include Oxnard, Thousand Oaks, Simi Valley, San Buenaventura (Ventura), Santa Maria (which represents the most populated areas). There are a total of 68 telephone prefix exchanges in this area code, which support an estimated 680,000 active or assignable phone numbers. These prefix lines are operated by 17 distinct carriers, with Oxnard as the primary rate center location.

Pacific Time79 Cities68 Prefixes

Reverse Phone Lookup in Oxnard, California

Unmask unknown callers, verify telemarketing reports, and view detailed owner information for any phone number beginning with area code (820).

How it works

1

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Provide any 10-digit phone number starting with the (820) area code.

2

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Our system scans public registries, carrier mappings, and spam reports.

3

Reveal Report

Access location details, line type, carrier, owner information, and safety levels.

Neighborhood Demographics

Calculated demographics and census summary estimations for area code 820.

33.1 y/oMedian Age
$84,600Median Income
$451,000Median Home Value
1,367,127Total Population

Telemarketer Complaints

Most recent complaints and comments for phone numbers beginning with 820.

Did you receive an unwanted call from a (820) phone number?

Help the community identify spammers by filing a comment.

(820) 714-2420May 16, 2026Telemarketer
Offered an unsolicited quote for local roofing and home energy services. They knew my area code but when I asked how they got my number, they hung up immediately.
See Details
(820) 727-2437May 20, 2026Debt Collector
Automated voice caller looking for someone named David. Keeps calling repeatedly asking to settle a debt. I have had this number for years and don't know David.
See Details
(820) 740-2454May 19, 2026Political
Pre-recorded campaign call promoting a local candidate. Did not respect my request to be placed on the Do Not Call list.
See Details
(820) 753-2471May 18, 2026Scam / Fraud
Received a text and follow-up call saying my bank account was locked due to suspicious transactions. Included a link to a fake login portal. Do not click!
See Details

Cities in the 820 Area Code

The most populous cities in area code 820 are: Oxnard (197,899), Thousand Oaks (126,683), Simi Valley (124,237), San Buenaventura (Ventura) (106,433), and Santa Maria (99,553).

Other cities in the 820 area code include:

Santa Barbara, Camarillo, San Luis Obispo, Lompoc, Moorpark, Goleta, El Paso de Robles (Paso Robles), Santa Paula, Orcutt, Atascadero, Isla Vista, Port Hueneme, Arroyo Grande, Nipomo, Fillmore, Los Osos, Grover Beach, Carpinteria, Morro Bay, Montecito, Templeton, Pismo Beach, Ojai, Oceano, El Rio.

CityPopulation% in Area Code
Oxnard197,899100%
Thousand Oaks126,68395%
Simi Valley124,23799%
San Buenaventura (Ventura)106,433100%
Santa Maria99,553100%
Santa Barbara88,410100%
Camarillo65,201100%
San Luis Obispo45,119100%
Lompoc42,434100%
Moorpark34,421100%
Goleta29,888100%
El Paso de Robles (Paso Robles)29,793100%
Santa Paula29,321100%
Orcutt28,905100%
Atascadero28,310100%
Isla Vista23,096100%
Port Hueneme21,723100%
Arroyo Grande17,252100%
Nipomo16,714100%
Fillmore15,002100%

Showing top 20 of 79 cities.

What Time Zone is Area Code 820?

Pacific Time Zone

Abbreviation: PT · UTC Offset: UTC-8

The 820 area code lies within the Pacific Time Zone (PT, UTC-8).

Nearby Area Codes

209Stockton, California213Los Angeles, California279Sacramento, California310Los Angeles, California323Los Angeles, California341Oakland, California350Stockton, California369Santa Rosa, California408San Jose, California415San Francisco, California

Phone Prefixes in the 820 Area Code

68 prefixes found · 17 carriers · 30 rate centers

PrefixCarrierRate Center
(820) 200ADVANCED TELECOM SOLUTIONS, LLCTHOUSAOAKS
(820) 201SHELCOMMOXNARD
(820) 202CSC WIRELESS, LLCSNLUSOBSPO
(820) 203T-MOBILE USA, INC.ATASCADERO
(820) 204NEW CINGULAR WIRELESS PCS, LLCCAMARILLO
(820) 205NEW CINGULAR WIRELESS PCS, LLCNEWBURYPRK
(820) 206T-MOBILE USA, INC.PASOROBLES
(820) 207NEW CINGULAR WIRELESS PCS, LLCCAMARILLO
(820) 208U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONSATASCADERO
(820) 209BANDWIDTH.COM CLEC, LLC - CAGAVIOTA
(820) 210NEW CINGULAR WIRELESS PCS, LLCCAMARILLO
(820) 212NEW CINGULAR WIRELESS PCS, LLCVNTRA EAST
(820) 213NEW CINGULAR WIRELESS PCS, LLCCAMARILLO
(820) 214NEW CINGULAR WIRELESS PCS, LLCNEWBURYPRK
(820) 215NEW CINGULAR WIRELESS PCS, LLCNEWBURYPRK
(820) 216DISH WIRELESS, LLCARROYOGRND
(820) 217DISH WIRELESS, LLCATASCADERO
(820) 218NEW CINGULAR WIRELESS PCS, LLCLOMPOC
(820) 219COMMIO, LLCCONEJO
(820) 220COMMIO, LLCPIRU
(820) 221NEW CINGULAR WIRELESS PCS, LLCSANTAMARIA
(820) 222FRACTEL, LLCCAMARILLO
(820) 223CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CASANBARBARA
(820) 224COMMIO, LLCNIPOMO
(820) 225T-MOBILE USA, INC.GUADALUPE
(820) 226ONVOY, LLC - CAEL RIO
(820) 227CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CASANTAMARIA
(820) 234FRACTEL, LLCOXNARD
(820) 280HD CARRIER LLCLOS ALAMOS
(820) 288FRACTEL, LLCVNTRA EAST
(820) 299FRACTEL, LLCCAMARILLO
(820) 300ONVOY, LLC - CAGUADALUPE
(820) 333FRACTEL, LLCTHOUSAOAKS
(820) 336FRACTEL, LLCGUADALUPE
(820) 345FRACTEL, LLCEL RIO
(820) 346FRACTEL, LLCARROYOGRND
(820) 348FRACTEL, LLCOXNARD
(820) 356FRACTEL, LLCPOINT MUGU
(820) 380ONVOY, LLC - CAPISMOBEACH
(820) 386FRACTEL, LLCSIMIVALLEY
(820) 400TWILIO INTERNATIONAL, INC.PARKFIELD
(820) 426TON80 COMMUNICATIONS, LLCCAMARILLO
(820) 432FRACTEL, LLCNEWBURYPRK
(820) 444FRACTEL, LLCNEWBURYPRK
(820) 465FRACTEL, LLCOXNARD
(820) 500FRACTEL, LLCGAVIOTA
(820) 502ONVOY SPECTRUM, LLCSIMIVALLEY
(820) 529FRACTEL, LLCPIRU
(820) 587FRACTEL, LLCSANBARBARA
(820) 600FRACTEL, LLCPISMOBEACH
(820) 666FRACTEL, LLCSNLUSOBSPO
(820) 667FRACTEL, LLCOXNARD
(820) 732FRACTEL, LLCVNTRA CNTL
(820) 758FRACTEL, LLCSANBARBARA
(820) 777FRACTEL, LLCSANTAPAULA
(820) 786FRACTEL, LLCATASCADERO
(820) 799FRACTEL, LLCCAMARILLO
(820) 800FRACTEL, LLCCAYUCOS
(820) 822FRACTEL, LLCOXNARD
(820) 823ONVOY, LLC - CASANTA YNEZ
(820) 837TON80 COMMUNICATIONS, LLCOXNARD
(820) 842FRACTEL, LLCOAKVIEW
(820) 850ONVOY SPECTRUM, LLCFILLMORE
(820) 888TERRA NOVA TELECOM INC.SIMIVALLEY
(820) 899FRACTEL, LLCSANTAMARIA
(820) 900FRACTEL, LLCBRADLEY
(820) 946FRACTEL, LLCSANTAMARIA
(820) 999FRACTEL, LLCOXNARD

Frequently Asked Questions

Where is area code 820?
Area code 820 is located in California, covering cities including Oxnard, Thousand Oaks, Simi Valley.
What time zone is area code 820?
Area code 820 is in the Pacific Time Zone (PT, UTC-8).
What state is area code 820?
Area code 820 is in California.