Area Code Overview

Area code 837 is a geographic telephone area code in California that went into service on January 31, 2025. The geographic regions covered by this area code overlay has a population of approximately 1,423,503.

Overlay and Dialing Rules

Area Code: 837
State: California
Type: General Purpose Code
In Service Date: January 31, 2025
Overlay Complex: 530/837
Local Dialing Plan: This area requires you to dial 1 and the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 837

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 837

No usage distribution is available for this area code.

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 837

Estimated assigned wireless phone numbers: 0

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

No wireless provider distribution is available for this area code.

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 837

Estimated assigned wireline and VoIP phone numbers: 0

No wireline or VoIP provider distribution is available for this area code.

Other / Unclassified Assigned Numbering in Area Code 837

Estimated assigned other or unclassified phone numbers: 0

No other or unclassified provider distribution is available for this area code.

Cities and Towns in Area Code 837

Adin, California Alleghany, California Alpine, California Alta, California Alturas, California Anderson, California Arbuckle, California Auburn, California Bangor, California Bieber, California Biggs, California Blairsden, California Burney, California Butte City, California Camptonville, California Cedarville, California Challenge, California Chester, California Chico, California Coleville, California Colfax, California Colusa, California Corning, California Cottonwood, California Davis, California Dorris, California Downieville, California Dunnigan, California Dunsmuir, California Elk Creek, California Esparto, California Etna, California Fall River Mills, California Foresthill, California Fort Jones, California French Gulch, California Gazelle, California Georgetown, California Gerber, California Grass Valley, California Greenville, California Grenada, California Gridley, California Grimes, California Guinda, California Hamburg, California Happy Camp, California Hayfork, California Herlong, California Homewood, California Hoopa, California Hornbrook, California Igloolik, California Janesville, California Keddie, California Knights Landing, California Lewiston, California Live Oak, California Los Molinos, California Loyalton, California Macdoel, California Marysville, California Maxwell, California Mccloud, California Meridian, California Millville, California Mineral, California Minersville, California Montague, California Mount Shasta, California Nevada City, California New Pine Creek, California Newell, California Nicolaus, California North San Juan, California Oak Knoll, California Oak Run, California Olinda, California Orland, California Orleans, California Oroville, California Paradise, California Paskenta, California Paynes Creek, California Placerville, California Platina, California Portola, California Princeton, California Quincy, California Ravendale, California Red Bluff, California Redding, California Richvale, California Robbins, California Sawyers Bar, California Shasta Lake, California Shingle Springs, California Shingletown, California Sierraville, California Smartsville, California Soda Springs, California Somes Bar, California South Lake Tahoe, California Stonyford, California Susanville, California Tahoe City, California Trinity Center, California Truckee, California Tulelake, California Verdi, California Vina, California Weaverville, California Weed, California Westwood, California Wheatland, California Williams, California Willow Creek, California Willows, California Winters, California Woodland, California Yreka, California

These geographic regions are also served by area code 530.

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 837, not live customer counts.

Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm