Discovering the truth about a phone number, email, or address history can be eye-opening, please use this tool with caution.USA Area code 820 - California, CA
Area code 820 is a North American Numbering Plan telephone area code serving Area codes in central California, United States in California. It was activated in 1957 .
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Who called me from area code 820?
A call from area code 820 most likely originates from California or elsewhere in California - but caller ID spoofing means the area code alone cannot confirm who called. Right now, 18 820 numbers carry scam reports on this page. The only reliable way to identify the caller is to check the full 10-digit number:
- Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
- Compare it against the recently reported scam numbers in 820 below.
- If the call was unwanted, report it to the FTC and use the report form on this page so other 820 residents see it.
Report a scam call from 820 Help other 820-area residents - takes 20 seconds, no signup
Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.
Should I answer a call from a 820 number? Take the 30-second quiz - 5 questions, verdict + advice
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Next step: run a reverse-phone lookup on the number to see everything public about it.
Cities in the 820 area code
Area code 820 serves the following 78 communities across 4 counties:
Area codes near 820 (overlay + neighboring)
If a caller ID shows one of these codes, the call is probably still from the California area or a nearby region. Click any code to see its own page.
820 area code robocall complaints (FCC data)
Monthly count of FCC complaints tagged to numbers in area code 820 over the last 12 months.
Source: FCC Consumer Complaint Data (dataset vakf-fz8e). Data as of August 9, 2026. Refreshed monthly.
How 820 area code spam calls arrive
Based on 18 FCC complaints in the last 12 months, here's how 820 spam calls reached recipients:
FCC Consumer Complaint Data, last 12 months as of August 9, 2026. Refreshed monthly. Note: the FCC dataset labels method (Live Voice / Prerecorded / SMS) but does not classify scam type (IRS impersonation, tech support fraud, etc.) - those come from community reports.
Recently reported scam numbers in 820
Numbers reported to the FCC or by our community in the last 12 months. Click any to run a full reverse-phone lookup.
Source: FCC Consumer Complaint Data, last 12 months as of August 9, 2026. Refreshed monthly. Numbers submitted via the report form near the top of this page get added here with a “community” badge after moderation.
How to block 820 spam calls (by carrier)
Getting repeated spam calls from 820 numbers around California, California? You can't legitimately block every 820 call without also missing legitimate ones from California, California - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.
AT&T
- Download the free AT&T ActiveArmor app (iOS + Android).
- Sign in with your wireless number.
- Enable Fraud Blocking and Suspected Spam Warning.
- To block a specific number, tap the call in your history → Block.
Verizon
- Download the free Verizon Call Filter app (iOS + Android).
- Sign in with your Verizon account.
- Turn on Spam Filter.
- To block a specific number: My Verizon → Blocks → Add Number.
T-Mobile
- Download the free Scam Shield app (iOS + Android).
- Enable Scam Block (blocks known scam calls silently).
- Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
- To block a specific number, dial
#662#from your device.
All carriers
- Register on the FTC's National Do-Not-Call list.
- Report unwanted calls to the FCC at fcc.gov/complaints.
- On iPhone: Settings → Phone → Silence Unknown Callers.
- On Android: Phone app → ⋮ → Settings → Caller ID & spam.
Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.
History of the 820 area code
state of California. The numbering plan area (NPA) includes most or all of the counties of San Luis Obispo, Santa Barbara, Ventura, and the southernmost portions of Monterey County. 805 was split from area code 213 in 1957, and area code 820 was added to the NPA in 2018, creating an area code overlay.
820 area code FAQ: common questions
What area code is 820?
Area code 820 is a North American Numbering Plan area code that serves Area codes in central California, United States in California, primarily including California and surrounding communities. It was activated in 1957.
Where does area code 820 cover?
Area code 820 covers Monterey County, San Luis Obispo County, Santa Barbara County, Ventura County, including cities such as Bradley, Gorda, Bryson, Parkfield, Arroyo Grande, and roughly 73 other communities.
Is 820 a real area code or a scam?
820 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 820 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.
How do I block 820 spam calls?
You cannot legitimately block an entire area code without also blocking legitimate calls from California. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.
What's the overlay area code for 820?
820 shares coverage with overlay code 805. That means new phone numbers issued in the same geographic area may have either area code, and 10-digit dialing is required.
Sources
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