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 83

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

Reports, 180 Days 381

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 108

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 31

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
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 Ojai Oxnard Parkfield

Top carriers and assignees

  • ONVOY, LLC - CA · 272 routing rows
  • NEW CINGULAR WIRELESS PCS, LLC · 221 routing rows
  • T-MOBILE USA, INC. · 126 routing rows
  • FRACTEL, LLC · 88 routing rows
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA · 62 routing rows
  • ONVOY SPECTRUM, LLC · 59 routing rows
  • COMMIO, LLC · 41 routing rows
  • BANDWIDTH.COM CLEC, LLC - CA · 34 routing rows
  • OPENTACT INC. · 13 routing rows
  • PEERLESS NETWORK OF CALIFORNIA, LLC - CA · 11 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
820-248-XXXX SANTAMARIA Santa Maria CA
820-249-XXXX VNTRA CNTL Ventura Central CA
820-250-XXXX OJAI Ojai CA
820-251-XXXX PASOROBLES Paso Robles 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 Castle Rock, COLORADO

September 21, 2026 at 6:55 PM

820-946-3101 was logged as a robocall. Category: Medical & prescriptions. Violation date: September 21, 2026 at 8:41 AM.

FTC report from Menifee, CALIFORNIA

September 21, 2026 at 6:50 PM

820-200-2333 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 21, 2026 at 3:41 PM.

FTC report from IOWA

September 21, 2026 at 6:26 PM

820-529-9102 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 21, 2026 at 5:22 PM.

FTC report from Ware, MASSACHUSETTS

September 21, 2026 at 4:45 PM

820-240-8447 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 21, 2026 at 12:00 PM.

FTC report from North Attleboro, MASSACHUSETTS

September 21, 2026 at 3:09 PM

820-500-0563 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 18, 2026 at 5:33 PM.

FTC report from GEORGIA

September 21, 2026 at 12:28 PM

820-444-3186 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 21, 2026 at 12:24 PM.

FTC report from Santa Maria, Ca, CALIFORNIA

September 20, 2026 at 12:53 AM

820-300-3477 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 19, 2026 at 10:01 AM.

FTC report from Santa Maria, Ca, CALIFORNIA

September 20, 2026 at 12:44 AM

820-300-3477 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 19, 2026 at 10:02 AM.

FTC report from Knoxville, TENNESSEE

September 18, 2026 at 8:33 PM

820-600-0479 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 18, 2026 at 8:28 PM.

FTC report from FLORIDA

September 18, 2026 at 8:06 PM

820-247-1149 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 18, 2026 at 12:41 PM.

FTC report from CALIFORNIA

September 18, 2026 at 2:56 PM

820-223-5111 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 18, 2026 at 2:40 PM.

FTC report from Phoenix, ARIZONA

September 18, 2026 at 11:56 AM

820-432-8117 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 18, 2026 at 12:00 AM.

FTC report from GEORGIA

September 17, 2026 at 7:44 PM

820-247-1892 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 17, 2026 at 10:34 AM.

FTC report from Santa Maria, Ca, CALIFORNIA

September 17, 2026 at 5:08 PM

820-900-9260 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 17, 2026 at 12:06 PM.

FTC report from Knoxville, TENNESSEE

September 17, 2026 at 4:12 PM

820-234-5531 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 17, 2026 at 4:10 PM.

FTC report from GEORGIA

September 17, 2026 at 2:49 PM

820-336-8151 was logged as a robocall. Category: No Subject Provided. Violation date: September 16, 2026 at 12:00 AM.

FTC report from Tampa, FLORIDA

September 17, 2026 at 2:42 PM

820-247-1942 was logged as a robocall. Violation date: September 1, 2026 at 12:08 PM.

FTC report from Port Saint Lucie, FLORIDA

September 16, 2026 at 3:08 PM

820-240-2051 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: August 27, 2026 at 12:00 PM.

FTC report from OKLAHOMA

September 16, 2026 at 1:18 PM

820-244-1370 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 16, 2026 at 3:42 PM.

FTC report from NORTH CAROLINA

September 16, 2026 at 10:24 AM

820-356-9697 was logged as a robocall. Violation date: September 16, 2026 at 10:17 AM.

FTC report from Blair, NEBRASKA

September 16, 2026 at 9:32 AM

820-444-5244 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 15, 2026 at 7:43 PM.

FTC report from Los Angeles, CALIFORNIA

September 15, 2026 at 9:47 PM

820-333-3226 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 15, 2026 at 9:13 AM.

FTC report from Saint Paris, OHIO

September 15, 2026 at 9:37 PM

820-280-8781 was logged as a unwanted call. Violation date: September 14, 2026 at 5:59 PM.

FTC report from TENNESSEE

September 15, 2026 at 6:38 PM

820-900-9939 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 15, 2026 at 5:35 PM.

FTC report from Hauula, HAWAII

September 15, 2026 at 6:07 PM

820-221-2565 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 10, 2026 at 12:00 PM.

FTC report from Chester, SOUTH CAROLINA

September 15, 2026 at 5:32 PM

820-529-3462 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 15, 2026 at 1:40 PM.

FTC report from Ormond Beach, FLORIDA

September 15, 2026 at 5:26 PM

820-240-8435 was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 15, 2026 at 12:00 PM.

FTC report from Fontana, CALIFORNIA

September 15, 2026 at 3:03 PM

820-228-1997 was logged as a live voice. Violation date: September 10, 2026 at 3:56 PM.

FTC report from Dalton, GEORGIA

September 15, 2026 at 1:45 PM

820-457-9244 was logged as a robocall. Violation date: September 14, 2026 at 12:00 PM.

FTC report from NEW YORK

September 14, 2026 at 11:20 AM

820-578-8226 was logged as a live voice. Violation date: September 9, 2026 at 3:03 AM.

FTC report from Georgeown, TEXAS

September 12, 2026 at 3:25 PM

820-206-6627 was logged as a robocall. Category: Dropped call or no message. Violation date: June 18, 2026 at 3:42 PM.

FTC report from TENNESSEE

September 11, 2026 at 6:59 PM

820-777-8992 was logged as a robocall. Violation date: September 11, 2026 at 5:10 PM.

FTC report from CALIFORNIA

September 11, 2026 at 3:43 PM

820-432-8722 was logged as a robocall. Violation date: September 11, 2026 at 12:42 PM.

FTC report from Centerville, OHIO

September 11, 2026 at 11:42 AM

820-426-6944 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 11, 2026 at 3:39 AM.

FTC report

September 10, 2026 at 6:19 PM

820-232-8469 was logged as a live voice. Violation date: September 10, 2026 at 5:12 PM.

FTC report from Lompoc, CALIFORNIA

September 10, 2026 at 5:22 PM

820-222-8650 was logged as a robocall. Violation date: September 10, 2026 at 1:00 PM.

FTC report from Ashtabula, OHIO

September 10, 2026 at 3:21 PM

820-600-8564 was logged as a unwanted call. Category: Medical & prescriptions. Violation date: September 10, 2026 at 3:15 PM.

FTC report from Longmont, COLORADO

September 10, 2026 at 12:42 AM

820-465-8576 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 9, 2026 at 3:56 PM.

FTC report from Los Altos, CALIFORNIA

September 9, 2026 at 10:00 PM

820-300-3725 was logged as a robocall. Violation date: September 8, 2026 at 1:18 PM.

FTC report from Oxnard, CALIFORNIA

September 9, 2026 at 5:16 PM

820-299-9306 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 9, 2026 at 5:59 PM.