Caller ID for
Area code 820
Area code 820 Camarillo, California
Area code 820 is one of the newer area codes, added in 2018 to California, with numbers assigned in Camarillo, Oxnard, Atascadero and 21 more places. It’s 9:11 PM there now.
- State
- California41 area codes in California
- Time zone
- Pacific9:11 PM there now
- Exchanges
- 9824 places
- Overlay
- 805Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 820 is
Numbers in 820 are assigned to 24 places in 5 counties: Ventura County, Santa Barbara County, San Luis Obispo County, Tulare County and Monterey County.
No single place dominates: Camarillo, the largest, has 12% of the exchanges.
- Camarillo12
- Oxnard8
- Atascadero8
- Santa Barbara8
- Santa Maria6
- San Luis Obispo3
- Arroyo Grande3
- Guadalupe3
- El Rio3
- Simi Valley3
- Thousand Oaks2
- Lompoc2
- Piru2
- Santa Paula2
- Pismo Beach2
- Nipomo1
- Ojai1
- Los Alamos1
- Pierpoint1
- Cayucos1
- Santa Ynez1
- Oak View1
- Fillmore1
- Bradley1
Phone companies in 820
98 blocks of numbers in 820 are held by 22 phone companies. The most belong to Fractel (32), AT&T Mobility (18) and Inteliquent (12).
A large share, about 65%, belongs to competitive and internet phone carriers; wireless networks hold 33% and local phone and cable companies 2%.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
820 went into service in 2018, added to the area of 805.
805 (since 1957) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
72 new exchanges were assigned since 2021, the latest in September 2026.
Calling 820
It’s 9:11 PM Pacific time in 820 right now.
From elsewhere in the U.S., dial 1, 820 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
California has 41 area codes: 209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949 and 951.
- 661 · Bakersfield, CA · about 62 mi
- 747 · Los Angeles, CA · about 85 mi
- 818 · Los Angeles, CA · about 87 mi
- 213 · Los Angeles, CA · about 90 mi
- 738 · Los Angeles, CA · about 90 mi
- 323 · Los Angeles, CA · about 91 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 820 area code
Map of the 820 area code around Camarillo, Oxnard and Atascadero, California.
Cities on the map
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Questions about 820
Where is area code 820?
In California, covering Camarillo, Oxnard and Atascadero and other places across 5 counties.
What time zone is 820 in?
Pacific time. It was 9:11 PM there when this page loaded.
Is 820 an overlay?
Yes. 805 serves the same area, so dial all 10 digits for local calls.
Which phone companies have 820 numbers?
22 companies hold blocks; the most belong to Fractel, AT&T Mobility and Inteliquent. About 33% of blocks are wireless.
Is 820 running out of numbers?
Not on record. 72 new exchanges have been assigned since 2021.