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Area Code Detail

Area Code 820

California (Ventura, San Luis Obispo, and Santa Barbara Counties) · In service since June 30, 2018

CA
Reports, 30 Days 63

Recent FCC and FTC complaint records tied to this area code.

Reports, 180 Days 292

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 102

Distinct NPA-NXX prefixes surfaced from routing and assignment data.

Carriers / Assignees 33

Named carriers, assignees, or code holders found in routing data.

Cities / Rate Centers 30

Distinct cities or rate centers attached to this area code.

States / Territories 1

Coverage footprint visible from NANPA, pooled block, and Canada routing data.

North American Phone Intelligence

Search a phone number, area code, exchange, or short code

Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.

Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
Examples: 206-739-5800, 206, 206-739, 48369
Overview

What this area code covers

California (Ventura, San Luis Obispo, and Santa Barbara Counties)

overlaid on 805

Common cities and rate centers

Arroyo Grande Atascadero Bradley Camarillo Cayucos Conejo El Rio Fillmore Gaviota Guadalupe Lompoc Los Alamos Newbury Park Nipomo Oak View Oxnard Parkfield Paso Robles

Top carriers and assignees

  • ONVOY, LLC - CA · 219 routing rows
  • NEW CINGULAR WIRELESS PCS, LLC · 214 routing rows
  • T-MOBILE USA, INC. · 122 routing rows
  • FRACTEL, LLC · 88 routing rows
  • ONVOY SPECTRUM, LLC · 62 routing rows
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA · 60 routing rows
  • COMMIO, LLC · 43 routing rows
  • BANDWIDTH.COM CLEC, LLC - CA · 33 routing rows
  • TON80 COMMUNICATIONS, LLC · 12 routing rows
  • BOOST SUBSCRIBERCO L.L.C. · 10 routing rows
  • LEAP TELECOM, LLC · 10 routing rows
  • MULTIPLE OCN LISTING · 9 routing rows
NPA-NXX

Prefix directory inside area code 820

Each prefix below is collapsed to one primary locality row so you can scan the area code by prefix without the duplicated block-level assignment rows.

Prefix Primary Rate Center Primary City State
820-200-XXXX THOUSAOAKS Thousand Oaks CA
820-201-XXXX OXNARD Oxnard CA
820-202-XXXX SNLUSOBSPO San Luis Obispo CA
820-203-XXXX ATASCADERO Atascadero CA
820-204-XXXX CAMARILLO Camarillo CA
820-205-XXXX NEWBURYPRK Newbury Park CA
820-206-XXXX PASOROBLES Paso Robles CA
820-207-XXXX CAMARILLO Camarillo CA
820-208-XXXX ATASCADERO Atascadero CA
820-209-XXXX GAVIOTA Gaviota CA
820-210-XXXX CAMARILLO Camarillo CA
820-211-XXXX XXXXXXXXXX CA
820-212-XXXX VNTRA EAST Ventura East CA
820-213-XXXX CAMARILLO Camarillo CA
820-214-XXXX NEWBURYPRK Newbury Park CA
820-215-XXXX NEWBURYPRK Newbury Park CA
820-216-XXXX ARROYOGRND Arroyo Grande CA
820-217-XXXX ATASCADERO Atascadero CA
820-218-XXXX LOMPOC Lompoc CA
820-219-XXXX CONEJO Conejo CA
820-220-XXXX PIRU Piru CA
820-221-XXXX SANTAMARIA Santa Maria CA
820-222-XXXX CAMARILLO Camarillo CA
820-223-XXXX SANBARBARA Santa Barbara CA
820-224-XXXX NIPOMO Nipomo CA
820-225-XXXX GUADALUPE Guadalupe CA
820-226-XXXX EL RIO El Rio CA
820-227-XXXX SANTAMARIA Santa Maria CA
820-228-XXXX LOMPOC Lompoc CA
820-229-XXXX SANBARBARA Santa Barbara CA
820-230-XXXX PASOROBLES Paso Robles CA
820-231-XXXX CAMARILLO Camarillo CA
820-232-XXXX NEWBURYPRK Newbury Park CA
820-233-XXXX SNLUSOBSPO San Luis Obispo CA
820-234-XXXX OXNARD Oxnard CA
820-235-XXXX VNTRA CNTL Ventura Central CA
820-236-XXXX SANBARBARA Santa Barbara CA
820-237-XXXX ATASCADERO Atascadero CA
820-238-XXXX CAMARILLO Camarillo CA
820-239-XXXX NEWBURYPRK Newbury Park CA
820-240-XXXX SANBARBARA Santa Barbara CA
820-241-XXXX ATASCADERO Atascadero CA
820-242-XXXX EL RIO El Rio CA
820-243-XXXX CAMARILLO Camarillo CA
820-244-XXXX SANTAMARIA Santa Maria CA
820-245-XXXX SANTAPAULA Santa Paula CA
820-246-XXXX ATASCADERO Atascadero CA
820-247-XXXX NEWBURYPRK Newbury Park CA
820-280-XXXX LOS ALAMOS Los Alamos CA
820-288-XXXX VNTRA EAST Ventura East CA
820-299-XXXX CAMARILLO Camarillo CA
820-300-XXXX GUADALUPE Guadalupe CA
820-311-XXXX XXXXXXXXXX CA
820-333-XXXX THOUSAOAKS Thousand Oaks CA
820-336-XXXX GUADALUPE Guadalupe CA
820-345-XXXX EL RIO El Rio CA
820-346-XXXX ARROYOGRND Arroyo Grande CA
820-348-XXXX OXNARD Oxnard CA
820-356-XXXX POINT MUGU Point Mugu CA
820-380-XXXX PISMOBEACH Pismo Beach CA
820-386-XXXX SIMIVALLEY Simi Valley CA
820-400-XXXX PARKFIELD Parkfield CA
820-411-XXXX XXXXXXXXXX CA
820-426-XXXX CAMARILLO Camarillo CA
820-432-XXXX NEWBURYPRK Newbury Park CA
820-444-XXXX NEWBURYPRK Newbury Park CA
820-465-XXXX OXNARD Oxnard CA
820-500-XXXX GAVIOTA Gaviota CA
820-502-XXXX SIMIVALLEY Simi Valley CA
820-511-XXXX XXXXXXXXXX CA
820-529-XXXX PIRU Piru CA
820-555-XXXX DIR ASST CA
820-587-XXXX SANBARBARA Santa Barbara CA
820-600-XXXX PISMOBEACH Pismo Beach CA
820-611-XXXX XXXXXXXXXX CA
820-666-XXXX SNLUSOBSPO San Luis Obispo CA
820-667-XXXX OXNARD Oxnard CA
820-700-XXXX CA
820-711-XXXX XXXXXXXXXX CA
820-732-XXXX VNTRA CNTL Ventura Central CA
820-758-XXXX SANBARBARA Santa Barbara CA
820-777-XXXX SANTAPAULA Santa Paula CA
820-786-XXXX ATASCADERO Atascadero CA
820-799-XXXX CAMARILLO Camarillo CA
820-800-XXXX CAYUCOS Cayucos CA
820-811-XXXX XXXXXXXXXX CA
820-822-XXXX OXNARD Oxnard CA
820-823-XXXX SANTA YNEZ Santa Ynez CA
820-837-XXXX OXNARD Oxnard CA
820-842-XXXX OAKVIEW Oak View CA
820-850-XXXX FILLMORE Fillmore CA
820-888-XXXX SIMIVALLEY Simi Valley CA
820-899-XXXX SANTAMARIA Santa Maria CA
820-900-XXXX BRADLEY Bradley CA
820-911-XXXX XXXXXXXXXX CA
820-946-XXXX SANTAMARIA Santa Maria CA
820-950-XXXX CA
820-958-XXXX CA
820-959-XXXX CA
820-976-XXXX CA
820-998-XXXX ATASCADERO Atascadero CA
820-999-XXXX OXNARD Oxnard CA
Recent Signals

Latest complaint activity tied to 820

Complaint pages are the strongest indexing opportunity for this site right now, especially for exact phone numbers and toll-free exchanges.

FTC report from Tuscumbia, ALABAMA

April 29, 2026 at 9:41 PM

820-600-3083 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 29, 2026 at 4:08 PM.

FTC report from Simi Valley, CALIFORNIA

April 29, 2026 at 6:30 PM

820-204-3302 was logged as a robocall. Category: Dropped call or no message. Violation date: April 29, 2026 at 3:24 PM.

FTC report from Cypress, MARYLAND

April 29, 2026 at 10:59 AM

820-235-7900 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 28, 2026 at 9:04 AM.

FTC report from Oxnard, CALIFORNIA

April 29, 2026 at 1:17 AM

820-240-6488 was logged as a robocall. Category: Dropped call or no message. Violation date: April 21, 2026 at 8:30 PM.

FTC report from Oxnard, CALIFORNIA

April 29, 2026 at 1:14 AM

820-240-7454 was logged as a robocall. Category: Dropped call or no message. Violation date: April 22, 2026 at 4:10 PM.

FTC report from Ovilla, CALIFORNIA

April 28, 2026 at 12:31 PM

820-333-3026 was logged as a robocall. Category: Dropped call or no message. Violation date: April 16, 2026 at 12:00 AM.

FTC report from La Grange, ILLINOIS

April 27, 2026 at 6:02 PM

820-206-6636 was logged as a live voice. Violation date: April 27, 2026 at 4:59 PM.

FTC report from Colton, CALIFORNIA

April 25, 2026 at 7:56 PM

820-240-4754 was logged as a live voice. Violation date: April 24, 2026 at 3:10 PM.

FTC report from Colton, CALIFORNIA

April 25, 2026 at 7:54 PM

820-240-6488 was logged as a live voice. Violation date: April 24, 2026 at 2:17 PM.

FTC report from Atlanta, GEORGIA

April 24, 2026 at 4:50 PM

820-235-7900 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 24, 2026 at 2:30 PM.

FTC report from VIRGINIA

April 24, 2026 at 4:25 PM

820-221-2185 was logged as a live voice. Violation date: April 24, 2026 at 12:00 AM.

FTC report from VIRGINIA

April 24, 2026 at 4:24 PM

820-218-5708 was logged as a live voice. Violation date: April 24, 2026 at 12:00 AM.

FTC report from Flagstaff, ARIZONA

April 23, 2026 at 7:07 PM

820-223-3153 was logged as a unwanted call. Violation date: April 22, 2026 at 3:00 AM.

FTC report from Dedham, MASSACHUSETTS

April 23, 2026 at 3:53 PM

820-273-2109 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 16, 2026 at 1:40 PM.

FTC report from COLORADO

April 23, 2026 at 2:27 PM

820-240-8142 was logged as a live voice. Violation date: April 23, 2026 at 12:12 PM.

FTC report from CALIFORNIA

April 23, 2026 at 11:14 AM

820-333-3501 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 23, 2026 at 12:00 AM.

FTC report from IOWA

April 21, 2026 at 10:18 PM

This report was logged as a robocall. Violation date: April 21, 2026 at 9:16 PM.

FTC report from Vallejo, CALIFORNIA

April 21, 2026 at 1:30 PM

820-200-4616 was logged as a live voice. Category: Vacation & timeshares. Violation date: April 20, 2026 at 11:27 AM.

FTC report from Cordova, TENNESSEE

April 20, 2026 at 1:09 PM

820-886-0689 was logged as a robocall. Violation date: April 20, 2026 at 10:27 AM.

FTC report from Denver, COLORADO

April 18, 2026 at 3:15 PM

820-589-7229 was logged as a robocall. Category: Lotteries, prizes & sweepstakes. Violation date: April 16, 2026 at 7:20 AM.

FTC report from New York, NEW YORK

April 17, 2026 at 9:34 PM

820-946-3464 was logged as a robocall. Violation date: April 17, 2026 at 5:58 PM.

FTC report from Fox Lake, ILLINOIS

April 17, 2026 at 8:14 PM

820-300-3630 was logged as a live voice. Violation date: April 15, 2026 at 10:47 AM.

FTC report from New York, NEW YORK

April 17, 2026 at 4:17 PM

820-946-3464 was logged as a robocall. Violation date: April 17, 2026 at 3:49 PM.

FTC report from Madison, ALABAMA

April 17, 2026 at 3:40 PM

820-206-0692 was logged as a live voice. Category: Lotteries, prizes & sweepstakes. Violation date: April 17, 2026 at 2:32 PM.

FTC report

April 17, 2026 at 2:10 PM

820-223-9748 was logged as a live voice. Violation date: April 17, 2026 at 1:00 PM.

FTC report from CALIFORNIA

April 17, 2026 at 1:03 PM

820-208-3191 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 17, 2026 at 9:52 AM.

FTC report from Bakersfield, CALIFORNIA

April 16, 2026 at 4:57 PM

820-244-9110 was logged as a live voice. Category: Energy, solar, & utilities. Violation date: April 16, 2026 at 1:53 PM.

FTC report from Bedford, KENTUCKY

April 16, 2026 at 3:46 PM

820-221-5344 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 16, 2026 at 3:40 PM.

FTC report from Corpus Christi, TEXAS

April 15, 2026 at 5:29 PM

820-356-7714 was logged as a robocall. Violation date: April 15, 2026 at 3:06 PM.

FTC report from Novato, CALIFORNIA

April 15, 2026 at 5:12 PM

820-587-8506 was logged as a robocall. Violation date: April 15, 2026 at 11:58 AM.

FTC report from Shelby, NORTH CAROLINA

April 15, 2026 at 2:36 PM

820-333-3284 was logged as a robocall. Violation date: April 14, 2026 at 5:32 PM.

FTC report from CALIFORNIA

April 14, 2026 at 11:02 PM

820-333-3720 was logged as a robocall. Category: Dropped call or no message. Violation date: April 14, 2026 at 8:20 AM.

FTC report from Grand Blanc, MICHIGAN

April 14, 2026 at 5:20 PM

820-222-8312 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 10, 2026 at 5:02 PM.

FTC report from CALIFORNIA

April 14, 2026 at 12:57 PM

820-223-3137 was logged as a unwanted call. Category: Dropped call or no message. Violation date: April 13, 2026 at 3:44 PM.

FTC report from NEW JERSEY

April 14, 2026 at 12:20 PM

820-333-1334 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 11, 2026 at 7:15 PM.

FTC report from Norfolk, NEBRASKA

April 13, 2026 at 7:52 PM

820-529-3342 was logged as a unwanted call. Violation date: April 13, 2026 at 6:48 PM.

FTC report from Lincoln, NEBRASKA

April 13, 2026 at 7:04 PM

820-300-3641 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 13, 2026 at 10:44 AM.

FTC report from NEW YORK

April 13, 2026 at 3:14 PM

820-400-4535 was logged as a robocall. Violation date: April 11, 2026 at 4:58 PM.

FTC report from Macon, GEORGIA

April 11, 2026 at 8:53 PM

820-336-9096 was logged as a live voice. Category: Lotteries, prizes & sweepstakes. Violation date: April 7, 2026 at 4:33 PM.

FTC report from Burbank, CALIFORNIA

April 10, 2026 at 4:40 PM

820-356-9772 was logged as a live voice. Violation date: April 10, 2026 at 1:35 PM.