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 55

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

Reports, 180 Days 348

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 104

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

Carriers / Assignees 35

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.

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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 · 230 routing rows
  • NEW CINGULAR WIRELESS PCS, LLC · 211 routing rows
  • T-MOBILE USA, INC. · 116 routing rows
  • FRACTEL, LLC · 90 routing rows
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA · 65 routing rows
  • ONVOY SPECTRUM, LLC · 62 routing rows
  • COMMIO, LLC · 44 routing rows
  • BANDWIDTH.COM CLEC, LLC - CA · 33 routing rows
  • OPENTACT INC. · 11 routing rows
  • PEERLESS NETWORK OF CALIFORNIA, LLC - CA · 10 routing rows
  • LEAP TELECOM, LLC · 10 routing rows
  • 8X8, INC. · 10 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
820-820-XXXX SANBARBARA Santa Barbara 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
820-880-XXXX SANBARBARA Santa Barbara 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 NEW JERSEY

July 1, 2026 at 9:37 PM

820-587-8330 was logged as a live voice. Violation date: June 30, 2026 at 8:04 PM.

FTC report from CALIFORNIA

June 30, 2026 at 5:51 PM

820-206-6183 was logged as a live voice. Violation date: June 30, 2026 at 2:22 PM.

FTC report from Eagle, NEBRASKA

June 30, 2026 at 9:39 AM

820-946-0757 was logged as a live voice. Violation date: June 29, 2026 at 10:14 PM.

FTC report from Lincoln, CALIFORNIA

June 29, 2026 at 2:31 PM

820-345-6237 was logged as a robocall. Violation date: June 27, 2026 at 9:30 AM.

FTC report from Simi Valley, CALIFORNIA

June 26, 2026 at 4:03 PM

820-777-1509 was logged as a robocall. Violation date: June 26, 2026 at 4:54 PM.

FTC report from Maryland Heights, MISSOURI

June 26, 2026 at 11:21 AM

820-222-2925 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 24, 2026 at 5:28 PM.

FTC report from Paulden, ARIZONA

June 25, 2026 at 6:49 PM

820-432-8619 was logged as a robocall. Violation date: June 25, 2026 at 1:32 PM.

FTC report from CALIFORNIA

June 25, 2026 at 3:32 PM

820-288-8209 was logged as a robocall. Category: Dropped call or no message. Violation date: June 25, 2026 at 11:26 AM.

FTC report from Los Angeles, CALIFORNIA

June 24, 2026 at 6:01 PM

820-444-7761 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 23, 2026 at 2:50 PM.

FTC report from Roseburg, OREGON

June 24, 2026 at 2:18 PM

820-500-5125 was logged as a live voice. Violation date: June 18, 2026 at 10:30 AM.

FTC report from Roseburg, OREGON

June 24, 2026 at 2:06 PM

820-600-0590 was logged as a live voice. Violation date: June 20, 2026 at 1:32 PM.

FTC report from Roseburg, OREGON

June 24, 2026 at 2:05 PM

820-444-4593 was logged as a live voice. Violation date: June 22, 2026 at 9:31 AM.

FTC report from CALIFORNIA

June 24, 2026 at 1:48 PM

820-206-6693 was logged as a robocall. Violation date: June 19, 2026 at 9:31 AM.

FTC report from Las Vegas, NEVADA

June 23, 2026 at 9:53 PM

820-600-3145 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 23, 2026 at 5:45 PM.

FTC report from Inglewood, CALIFORNIA

June 23, 2026 at 2:38 PM

820-444-5978 was logged as a robocall. Violation date: June 23, 2026 at 10:45 AM.

FTC report from Dallas, TEXAS

June 22, 2026 at 6:53 PM

820-900-0197 was logged as a robocall. Violation date: June 22, 2026 at 5:49 PM.

FTC report from Maryland Heights, MISSOURI

June 21, 2026 at 3:20 PM

820-356-9735 was logged as a unwanted call. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 17, 2026 at 3:24 PM.

FTC report from CONNECTICUT

June 20, 2026 at 3:28 PM

820-465-8669 was logged as a live voice. Violation date: June 19, 2026 at 7:04 PM.

FTC report from Grover Beach, CALIFORNIA

June 19, 2026 at 2:30 PM

820-222-2051 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 19, 2026 at 11:25 AM.

FTC report from Lincoln, CALIFORNIA

June 18, 2026 at 6:16 PM

820-240-8502 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 16, 2026 at 9:14 AM.

FTC report from Belleville, TENNESSEE

June 18, 2026 at 3:33 PM

820-786-0177 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: March 17, 2026 at 12:05 PM.

FTC report from Anchorage, ALASKA

June 18, 2026 at 1:18 PM

820-786-7833 was logged as a robocall. Violation date: June 18, 2026 at 6:54 AM.

FTC report from Arlington Heights, CALIFORNIA

June 17, 2026 at 1:45 PM

820-444-5978 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 12, 2026 at 2:43 PM.

FTC report from Dallas, TEXAS

June 16, 2026 at 7:54 PM

820-348-6369 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 16, 2026 at 6:51 PM.

FTC report from Modesto, CALIFORNIA

June 16, 2026 at 1:51 PM

820-288-8356 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 16, 2026 at 10:28 AM.

FTC report from Plano, TEXAS

June 16, 2026 at 10:45 AM

820-752-5596 was logged as a robocall. Category: Medical & prescriptions. Violation date: June 15, 2026 at 4:22 PM.

FTC report from NEW JERSEY

June 15, 2026 at 9:45 PM

820-899-9607 was logged as a live voice. Violation date: June 15, 2026 at 8:45 PM.

FTC report from CALIFORNIA

June 15, 2026 at 8:35 PM

820-500-5279 was logged as a robocall. Category: No Subject Provided. Violation date: June 15, 2026 at 6:09 AM.

FTC report from CALIFORNIA

June 15, 2026 at 6:27 PM

820-900-0790 was logged as a robocall. Category: Dropped call or no message. Violation date: June 15, 2026 at 10:21 AM.

FTC report from Henderson, NEVADA

June 15, 2026 at 4:12 PM

820-200-7774 was logged as a live voice. Category: Computer & technical support. Violation date: June 9, 2026 at 12:00 PM.

FTC report from Roseburg, OREGON

June 15, 2026 at 2:18 PM

820-400-4428 was logged as a live voice. Violation date: June 8, 2026 at 6:13 PM.

FTC report from Annapolis, MARYLAND

June 15, 2026 at 12:32 PM

820-900-0047 was logged as a unwanted call. Category: Dropped call or no message. Violation date: June 12, 2026 at 12:02 PM.

FTC report from Mobile, MISSISSIPPI

June 14, 2026 at 11:28 AM

820-666-6879 was logged as a robocall. Violation date: May 30, 2026 at 3:13 PM.

FTC report from MICHIGAN

June 14, 2026 at 1:27 AM

820-899-6134 was logged as a live voice. Category: Dropped call or no message. Violation date: June 14, 2026 at 12:01 AM.

FTC report from NEW MEXICO

June 12, 2026 at 2:44 PM

820-223-0057 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 12, 2026 at 12:00 AM.

FTC report from New York, NEW YORK

June 12, 2026 at 1:17 PM

820-732-5083 was logged as a robocall. Violation date: June 12, 2026 at 12:36 PM.

FTC report from Dallas, TEXAS

June 11, 2026 at 6:48 PM

820-529-9294 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 11, 2026 at 5:00 PM.

FTC report from Anchorage, ALASKA

June 11, 2026 at 1:43 PM

820-222-7922 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: June 11, 2026 at 9:29 AM.

FTC report from Dallas, TEXAS

June 11, 2026 at 11:23 AM

820-386-3241 was logged as a robocall. Violation date: June 11, 2026 at 10:18 AM.

FTC report from Signal Mountain, TENNESSEE

June 10, 2026 at 10:33 PM

820-234-0170 was logged as a robocall. Category: Dropped call or no message. Violation date: April 20, 2026 at 10:15 AM.