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 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.
On June 8, 2023, the California Public Utilities Commission assigned area code 837 to overlay 530, effectively in service on January 31, 2025. 837 is California's 40th area code. As ten-digit dialing is already in effect, no permissive dialing period will be necessary.
Service area 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
Alpine Village Bear Valley Markleeville Mesa Vista Woodfords
Butte County
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
Arbuckle College City Colusa Grimes Maxwell Princeton Sites Stonyford Williams
El Dorado County
Cameron Park Camino Coloma Cool Diamond Springs Ditch Camp Five Echo Lake El Dorado Fresh Pond Garden Valley Georgetown Kyburz Little Norway Meyers Nebelhorn Newtown Pacific Phillips Placerville Pollock Pines Rescue Riverton Sciots Camp Shingle Springs South Lake Tahoe Twin Bridges White Hall
Glenn County
Artois Glenn Hamilton City Ordbend Butte City Orland Willows
Humboldt County
Willow Creek Hoopa
Lassen County
Bieber Doyle Herlong Janesville Ravendale Susanville Termo Westwood
Modoc County
Adin Alturas Canby Cedarville Davis Creek Eagleville Fort Bidwell Newell Stronghold Tionesta
Nevada County
Alta Sierra Grass Valley Lake of the Pines Lake Wildwood Nevada City Penn Valley Rough and Ready Truckee Washington
Placer County
Alta Applegate Auburn Carnelian Bay Colfax Dollar Point Dutch Flat Emigrant Gap Foresthill Gold Run, California Homewood Kings Beach Meadow Vista Sheridan Squaw Valley Sunnyside-Tahoe City Tahoe Vista Weimar
Plumas County
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
Anderson Bella Vista Big Bend Burney Cassel Castella Cottonwood Fall River Mills French Gulch Hat Creek Igo Lakehead-Lakeshore McArthur Millville Montgomery Creek Oak Run Old Station Palo Cedro Platina Pollard Flat Redding Round Mountain Shasta Lake City Shasta Shingletown Whiskeytown Whitmore
Sierra County
Alleghany Calpine Downieville Loyalton Sierra City
Siskiyou County
Carrick Dorris Dunsmuir Edgewood Etna Forks of Salmon Fort Jones Gazelle Greenview Grenada Happy Camp Hornbrook Macdoel McCloud Montague Mount Hebron Mount Shasta Seiad Valley Tennant Tulelake Weed Yreka
Sutter County
Live Oak Meridian Nicolaus Rio Oso Robbins South Yuba City Sutter Tierra Buena Yuba City
Tehama County
Corning Cottonwood Dales Gerber-Las Flores Los Molinos Manton Mill Creek Mineral Paskenta Paynes Creek Rancho Tehama Red Bluff Tehama
Trinity County
Big Bar Burnt Ranch Douglas City Hayfork Hyampom Junction City Lewiston Mad River Salyer Trinity Center Weaverville
Yolo County
Brooks Capay Davis Dunnigan El Macero Esparto Fremont Knights Landing Madison Plainfield Rumsey Winters Woodland Yolo Zamora
Yuba County
Beale Air Force Base Challenge-Brownsville Linda Loma Rica Marysville Olivehurst Plumas Lake Wheatland
See also List of California area codes List of North American Numbering Plan area codes
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