Area codes 530 and 837
Area codes 530 and 837 are telephone area codes in the North American Numbering Plan (NANP) in northeastern and Northern California. 530 was created in 1997 in an area code split of 916 and 837 was added to the same numbering plan area as an overlay in 2025.
The numbering plan area (NPA) includes the Sacramento Valley, including some outer suburbs of Sacramento, Shasta Cascade, and the northern Sierra Nevada. It comprises all or sections of the following counties: Alpine, Butte, Colusa, El Dorado, Glenn, Humboldt, Lassen, Modoc, Mono, Nevada, Placer, Plumas, Shasta, Sierra, Siskiyou, Sutter, Tehama, Trinity, Yolo, and Yuba.
History
[edit | edit source]Area code 530 was created in a split of numbering plan area 916 on November 1, 1997. Simultaneously, the Dixon exchange was reassigned from area code 916 to area code 707, and from the Sacramento Local access and transport area (LATA) to the San Francisco LATA.
Prior to October 2021, area code 530 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.[1]
On June 8, 2023, the California Public Utilities Commission assigned area code 837 to overlay 530, effectively in service on January 31, 2025.[2] 837 is California's 40th area code. As ten-digit dialing is already in effect, no permissive dialing period will be necessary.[3]
Service area
[edit | edit source]Major cities in the numbering plan area include Auburn, Chico, Colfax, Davis, Grass Valley, Corning, Marysville, Oroville, Paradise, Placerville, Redding, Red Bluff, Susanville, Truckee, Woodland, Yuba City, and South Lake Tahoe.
Alpine County
[edit | edit source]Butte County
[edit | edit source]- Bangor
- Berry Creek
- Biggs
- Brush Creek
- Butte Meadows
- Centerville
- Cherokee
- Chico
- Cohasset
- Concow
- Dayton
- DeSabla
- Durham
- East Biggs
- Feather Falls
- Forbestown
- Forest Ranch
- Gridley
- Inskip
- Magalia
- Merrimac
- Nord
- Oregon City
- Oroville East
- Oroville
- Palermo
- Paradise
- Pulga
- Richvale
- South Oroville
- Stirling City
- Thermalito
- Yankee Hill
Colusa County
[edit | edit source]El Dorado County
[edit | edit source]Glenn County
[edit | edit source]Humboldt County
[edit | edit source]Lassen County
[edit | edit source]Modoc County
[edit | edit source]Nevada County
[edit | edit source]Placer County
[edit | edit source]Plumas County
[edit | edit source]- Almanor
- Beckwourth
- Belden
- Blairsden
- Bucks Lake
- C-Road
- Canyondam
- Caribou
- Chester
- Chilcoot-Vinton
- Clio
- Crescent Mills
- Cromberg
- Delleker
- East Quincy
- East Shore
- Graeagle
- Greenhorn
- Greenville
- Hamilton Branch
- Indian Falls
- Iron Horse
- Johnsville
- Keddie
- La Porte
- Lake Almanor Country Club
- Lake Almanor Peninsula
- Lake Almanor West
- Lake Davis
- Little Grass Valley
- Meadow Valley
- Mohawk Vista
- Paxton
- Plumas Eureka
- Portola
- Prattville
- Quincy
- Spring Garden
- Storrie
- Taylorsville
- Tobin
- Twain
- Valley Ranch
- Whitehawk
Shasta County
[edit | edit source]Sierra County
[edit | edit source]Siskiyou County
[edit | edit source]Sutter County
[edit | edit source]Tehama County
[edit | edit source]Trinity County
[edit | edit source]Yolo County
[edit | edit source]Yuba County
[edit | edit source]See also
[edit | edit source]References
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External links
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| North: 541/458 | ||
| West: 707/369 | 530/837 | East: 775 |
| South: 209/350, 760/442, 916/279 | ||
| Nevada area codes: 702/725, 775 | ||
| Oregon area codes: 503/971, 541/458 | ||
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- Area codes in California
- Alpine County, California
- Butte County, California
- Colusa County, California
- El Dorado County, California
- Glenn County, California
- Humboldt County, California
- Lassen County, California
- Modoc County, California
- Nevada County, California
- Placer County, California
- Plumas County, California
- Shasta County, California
- Sierra County, California
- Siskiyou County, California
- Sutter County, California
- Tehama County, California
- Trinity County, California
- Yolo County, California
- Yuba County, California
- Northern California
- Sacramento Valley
- Sierra Nevada (United States)
- Area codes in the United States
- 1997 establishments in California
- Telecommunications-related introductions in 2025
- Telecommunications-related introductions in 1997