Geographic area code
820 area code
Assigned to California. An area code does not identify a caller's exact city, address, or current location.
Area code facts
Same or related numbering region
Overlay codes
Overlay peers can serve the same geography. They are shown with equal weight, not as secondary alternatives.
Approximate map
State-level orientation for California; the marker is not the exact 820 service boundary.
820 orientation · California
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Why is the map approximate?
Telephone area codes are assigned through exchanges and overlay complexes, not as a single official street-level polygon. This map centers a known city associated with the code when available; otherwise it uses the jurisdiction center. It must not be used to locate a specific caller or phone.
Interpret the result
What 820 tells you—and what it cannot
- FACT
Numbering-plan assignment
820 is assigned to California under the NANP snapshot.
- CONTEXT
Overlays and time zone
Its listed overlay peers are 805. Time-zone labels describe the service region, not a caller's current clock.
- LIMIT
Not a reverse-phone lookup
The code alone cannot identify a subscriber, prove a caller's identity, or show where a mobile phone is now.
Source: North American Numbering Plan Administrator (NANPA) NPA report · file date 08/04/2026 · status and relief fields are descriptive, not a promise of future availability.
Same jurisdiction
Other California area codes
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NANPA snapshot
08/04/2026