837 area code
Area code 837 is in California. It covers Chico, Redding, South Lake Tahoe and 51 other places: 53 ZIP codes in Butte, Shasta, El Dorado and 5 other counties. Local time there is , Pacific Time. In service since 2025 as an overlay: it covers the same area as 530, so a number from there can have either code.
- State
- California
- Time zone
- Pacific
- Largest city
- Chico
- Overlays
- 530
- In service since
- 2025
- Rate centres
- 10
- Prefixes assigned
- 11 (110,000 numbers)
Who calls from a 837 number
NANPA records the carrier each block of 837 numbers is assigned to. Of the 22,000 837 numbers assigned, 82% are with cable, internet-calling, business and other carriers (Onvoy, Wide Voice and Exiant Communications); 18% with mobile carriers (T-Mobile).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Onvoy | Cable, VoIP, other | 45% |
| T-Mobile | Mobile | 18% |
| Wide Voice | Cable, VoIP, other | 18% |
| Exiant Communications | Cable, VoIP, other | 9% |
| Bandwidth | Cable, VoIP, other | 5% |
| Opentact | Cable, VoIP, other | 5% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 837
The 9 places with a telephone rate centre of their own using 837, largest first. Each links to its ZIP codes.
| Place | ZIP codes | Population |
|---|---|---|
| Chico, CA | 6 | 102,188 |
| Redding, CA | 5 | 93,409 |
| Truckee, CA | 3 | 17,066 |
| Red Bluff, CA | 1 | 14,549 |
| Auburn, CA | 3 | 13,768 |
| Shingle Springs, CA | 1 | 3,801 |
| Nevada City, CA | 1 | 3,172 |
| Homewood, CA | 1 | 609 |
| Hornbrook, CA | 1 | 268 |
Nearby places using 837
These places have no rate centre of their own in NANPA's records; the nearest one uses 837. Near an area-code boundary that can be wrong for part of a town.
- South Lake Tahoe
- North Auburn
- Alta Sierra
- Lake of the Pines
- Durham
- El Dorado
- Cool
- Tahoe City
- Auburn Lake Trails
- Meadow Vista
- Kings Beach
- Applegate
- Hamilton City
- Meyers
- Centerville
- Forest Ranch
- Sunnyside-Tahoe City
- Newcastle
- Dollar Point
- Pilot Hill
- Greenwood
- Olympic Valley
- Jones Valley
- Cedar Flat
- Tahoe Vista
- Tahoma
- Mountain Gate
- Butte Creek Canyon
- Bend
- Cohasset
- Klamath River
- Carnelian Bay
- Keswick
- Nord
- Washington
- Dales
- Igo
- Twin Bridges
- Ono
- Kyburz
- Butte Meadows
- Kingvale
- Graniteville
- Obrien
- Whiskeytown
ZIP codes in area code 837
53 ZIP codes in 33 towns, by the town each is mailed to, largest first. Each links to its own page.
Where 837 numbers are issued
NANPA's rate centres with the most 837 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
REDDING | Redding | 2 |
AUBN MAIN | Auburn | 1 |
CHICO | Chico | 1 |
HOMEWOOD | Homewood | 1 |
HORNBROOK | Hornbrook | 1 |
NEVADACITY | Nevada City | 1 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Butte County (8)
- Shasta County (8)
- El Dorado County (16)
- Placer County (12)
- Nevada County (5)
- Tehama County (1)
- Glenn County (1)
- Siskiyou County (2)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 837
Where is area code 837?
Area code 837 is in California. It covers Chico, Redding, South Lake Tahoe and 51 other places: 53 ZIP codes in Butte, Shasta, El Dorado and 5 other counties.
What ZIP codes are in area code 837?
53 ZIP codes, by the town each is mailed to: Chico (6, 95926 to 95976), Redding (5, 96001 to 96099), South Lake Tahoe (8, 96150 to 96158), Truckee (3, 96160 to 96162) and 29 more towns. The full list is on this page.
What time zone is area code 837 in?
Pacific time.
Is a 837 number a mobile or a landline?
It can be either. 18% of 837 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
What area codes overlay 837?
530. They cover the same area as 837, so a new number there can be given any of them.
Does a 837 number mean the caller is in California?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 837 call can come from anywhere.
Other area codes in California
- 209 Fresno
- 213 Los Angeles
- 279 Sacramento
- 310 Torrance
- 323 Los Angeles
- 341 Oakland
- 350 Stockton
- 357 Fresno
- 369 Santa Rosa
- 408 San Jose
- 415 San Francisco
- 424 Torrance
- 442 Oceanside
- 510 Oakland
- 530 Chico
- 559 Fresno
- 562 Long Beach
- 619 San Diego
- 626 Pasadena
- 628 San Francisco
- 650 San Mateo
- 657 Anaheim
- 661 Bakersfield
- 669 San Jose
- 707 Santa Rosa
- 714 Anaheim
- 738 Los Angeles
- 747 Glendale
- 760 Oceanside
- 805 Bakersfield
- 818 Glendale
- 820 Oxnard
- 831 Salinas
- 840 Fontana
- 858 San Diego
- 909 Fontana
- 916 Sacramento
- 925 Concord
- 949 Irvine
- 951 Riverside
All 41 California area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 837.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/837
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