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US area code · California

Area code 820

Where the 820 area code is, its overlay and how to dial a +1 820 number from anywhere.

CoversCaliforniaTime zonePacific (PT)TypeOverlay
Quick answer

The 820 area code is in California, United States (Pacific (PT)). To call from abroad: +1 820 555-0123. It is an overlay, so all 10 digits are dialled.

StateCalifornia
Time zonePacific (PT)
TypeOverlay
10-digit dialingRequired
In service since25-May-2017

The 820 area code is a geographic North American Numbering Plan (NANP) code covering California. It has been in service since 25-May-2017 and sits in the Pacific (PT) time zone.

Overlay 820 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

820805

How to dial a 820 number

From abroad+1 820 555-0123
Within the US / Canada1 820 555-0123
Locally (same area)820 555-0123

Other California area codes

209213279310323341350357369408415424442510530559

Frequently asked questions

Where is the 820 area code?

The 820 area code is in California, United States (Pacific (PT)).

Is 820 an overlay area code?

Yes. 820 overlays the same region as 805, so callers dial all 10 digits.

Do I have to dial 10 digits for 820?

Yes — dial the area code plus the seven-digit number.

How do I call a 820 number from another country?

Dial your exit code (or +), then 1, then 820, then the number: +1 820 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 820 number does not pinpoint a street or ZIP code.

Missed a call from +1 820?

In the 30 days to September 24, 2026, 89 unwanted calls showing a 820 number were reported to the US Federal Trade Commission, 66% of them recorded messages or robocalls. That puts 820 at #379 of 670 area codes reported.

Other30
Calls pretending to be government, businesses, or family and friends27
Reducing your debt (credit cards, mortgage, student loans)21
Dropped call or no message2
Before you call back
  • If you do not know anyone in California, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 820 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 820 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 820:

Fractel, LLC 32New Cingular Wireless PCS, LLC 16Onvoy, LLC 11Multiple Ocn Listing 9T-Mobile USA, Inc. 8 5

About 26.9% of the 108 prefixes in use belong to mobile carriers: a 820 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 820 — cities & rate centres