837 Area CodeRedding, CA
Area code 837 covers Redding and nearby communities in California, in the Pacific Time (PT) zone, home to about 1,812,653 people across 278 cities. It was added in 2025 as an overlay of 530, so the same region uses both codes and every local call needs all ten digits.
Overview
- Major City
- Redding
- State
- California (CA)
- Timezone
- Pacific Time (PT)
- Current Time
- –:––
- Overlay
- Yes – shares area with 530
Where is area code 837?
Area code 837 serves part of Redding, CA and the surrounding areas. It has a single overlay (530) that serves the same area.
Overview of the 837 Area Code
What is the 837 area code?
The 837 area code serves Redding, California, alongside other established area codes. When you see a 837 number, it indicates a local number within this geographic area.
Why was area code 837 created?
Area code 837 went into service on January 31, 2025, as an overlay of 530. An overlay adds a second code to the same territory instead of splitting it: existing 530 numbers kept their digits, new lines began receiving 837 numbers, and local calls in the region require all ten digits.
Geographic Coverage of the 837 Area Code
The 837 area code serves Redding and surrounding areas in California. It operates within the Pacific Time (PT) time zone. It complements the coverage of area code 530. This area code covers several key cities, including:
- Chico
- Redding
- Yuba City
- Davis
- Woodland
- El Dorado Hills
Got a call from an 837 number? It came from Redding, CA. Since 837 overlays with 530, every local call in the region needs all ten digits to land on the right line. Of the listed cities' population, Redding accounts for about 10.3%; the rest is split across 277 smaller cities.
Redding Area Codes Overview
Redding is served by multiple area codes, reflecting its telecommunications needs. The 837 area code operates alongside 530. Here are the area codes serving this region:
The introduction of the 837 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 837 cover?
| City | State | Population | Population in 837 | % of listed-city population | % of City |
|---|---|---|---|---|---|
| Chico | CA | 102,911 | 102,911 | 10.3% | 100.0% |
| Redding | CA | 93,502 | 93,502 | 9.4% | 100.0% |
| Yuba City | CA | 69,148 | 69,148 | 7.0% | 100.0% |
| Davis | CA | 67,125 | 67,125 | 6.8% | 100.0% |
| Woodland | CA | 62,983 | 62,983 | 6.3% | 100.0% |
| El Dorado Hills | CA | 42,108 | 7,997 | 4.2% | 19.0% |
| South Lake Tahoe | CA | 21,225 | 21,225 | 2.1% | 100.0% |
| Oroville | CA | 19,712 | 19,712 | 2.0% | 100.0% |
| Cameron Park | CA | 18,228 | 18,228 | 1.8% | 100.0% |
| Linda | CA | 17,773 | 17,773 | 1.8% | 100.0% |
| Truckee | CA | 17,240 | 17,240 | 1.7% | 100.0% |
| Red Bluff | CA | 14,286 | 14,286 | 1.4% | 100.0% |
| Grass Valley | CA | 14,085 | 14,085 | 1.4% | 100.0% |
| Auburn | CA | 13,780 | 9,736 | 1.4% | 70.7% |
| Olivehurst | CA | 13,656 | 13,656 | 1.4% | 100.0% |
| North Auburn | CA | 13,022 | 13,022 | 1.3% | 100.0% |
| Marysville | CA | 12,714 | 12,714 | 1.3% | 100.0% |
| Susanville | CA | 12,359 | 12,359 | 1.3% | 100.0% |
| Magalia | CA | 11,310 | 11,310 | 1.1% | 100.0% |
| Anderson | CA | 11,171 | 11,171 | 1.1% | 100.0% |
| Diamond Springs | CA | 11,037 | 11,037 | 1.1% | 100.0% |
| Placerville | CA | 10,695 | 10,695 | 1.1% | 100.0% |
| Shasta Lake | CA | 10,244 | 10,244 | 1.0% | 100.0% |
| Live Oak | CA | 9,503 | 9,503 | 1.0% | 100.0% |
| Paradise | CA | 9,114 | 0 | 0.9% | 0.0% |
| Orland | CA | 8,605 | 8,605 | 0.9% | 100.0% |
| Oroville East | CA | 8,280 | 8,280 | 0.8% | 100.0% |
| Corning | CA | 8,131 | 8,131 | 0.8% | 100.0% |
| Winters | CA | 7,825 | 7,825 | 0.8% | 100.0% |
| Yreka | CA | 7,686 | 7,686 | 0.8% | 100.0% |
| Gridley | CA | 7,355 | 7,355 | 0.7% | 100.0% |
| Alta Sierra | CA | 6,911 | 6,911 | 0.7% | 100.0% |
| Pollock Pines | CA | 6,871 | 6,871 | 0.7% | 100.0% |
| Thermalito | CA | 6,646 | 6,646 | 0.7% | 100.0% |
| Colusa | CA | 6,589 | 6,589 | 0.7% | 100.0% |
| Willows | CA | 6,079 | 6,079 | 0.6% | 100.0% |
| Plumas Lake | CA | 5,853 | 5,853 | 0.6% | 100.0% |
| University of California Davis | CA | 5,786 | 5,786 | 0.6% | 100.0% |
| South Oroville | CA | 5,742 | 5,742 | 0.6% | 100.0% |
| Williams | CA | 5,598 | 5,598 | 0.6% | 100.0% |
| Durham | CA | 5,518 | 5,518 | 0.6% | 100.0% |
| Palermo | CA | 5,382 | 5,382 | 0.5% | 100.0% |
| Lake Wildwood | CA | 4,991 | 4,991 | 0.5% | 100.0% |
| Shingle Springs | CA | 4,432 | 4,432 | 0.5% | 100.0% |
| Wheatland | CA | 4,110 | 4,110 | 0.4% | 100.0% |
| Lake of the Pines | CA | 3,917 | 3,917 | 0.4% | 100.0% |
| Kings Beach | CA | 3,796 | 3,796 | 0.4% | 100.0% |
| Weaverville | CA | 3,600 | 3,600 | 0.4% | 100.0% |
| Auburn Lake Trails | CA | 3,426 | 3,426 | 0.4% | 100.0% |
| Cottonwood | CA | 3,316 | 3,316 | 0.3% | 100.0% |
| Meadow Vista | CA | 3,217 | 3,217 | 0.3% | 100.0% |
| Nevada City | CA | 3,195 | 3,195 | 0.3% | 100.0% |
| Burney | CA | 3,154 | 3,154 | 0.3% | 100.0% |
| Mount Shasta | CA | 3,124 | 3,124 | 0.3% | 100.0% |
| Esparto | CA | 3,108 | 3,108 | 0.3% | 100.0% |
| Lake California | CA | 3,054 | 3,054 | 0.3% | 100.0% |
| Arbuckle | CA | 3,028 | 3,028 | 0.3% | 100.0% |
| Sutter | CA | 2,904 | 2,904 | 0.3% | 100.0% |
| Bella Vista | CA | 2,781 | 2,781 | 0.3% | 100.0% |
| Alturas | CA | 2,652 | 2,652 | 0.3% | 100.0% |
| Weed | CA | 2,633 | 2,633 | 0.3% | 100.0% |
| Kelly Ridge | CA | 2,544 | 2,544 | 0.3% | 100.0% |
| East Quincy | CA | 2,489 | 2,489 | 0.3% | 100.0% |
| Hayfork | CA | 2,368 | 2,368 | 0.2% | 100.0% |
| Loma Rica | CA | 2,368 | 2,368 | 0.2% | 100.0% |
| Georgetown | CA | 2,367 | 2,367 | 0.2% | 100.0% |
| Shingletown | CA | 2,283 | 2,283 | 0.2% | 100.0% |
| Chester | CA | 2,144 | 2,144 | 0.2% | 100.0% |
| Portola | CA | 2,086 | 2,086 | 0.2% | 100.0% |
| Colfax | CA | 2,058 | 2,058 | 0.2% | 100.0% |
| Los Molinos | CA | 2,037 | 2,037 | 0.2% | 100.0% |
| Biggs | CA | 1,941 | 1,941 | 0.2% | 100.0% |
| Shasta | CA | 1,771 | 1,771 | 0.2% | 100.0% |
| Hamilton City | CA | 1,759 | 1,759 | 0.2% | 100.0% |
| Camino | CA | 1,750 | 1,750 | 0.2% | 100.0% |
| Quincy | CA | 1,728 | 1,728 | 0.2% | 100.0% |
| Willow Creek | CA | 1,710 | 1,710 | 0.2% | 100.0% |
| Westwood | CA | 1,647 | 1,647 | 0.2% | 100.0% |
| Penn Valley | CA | 1,621 | 1,621 | 0.2% | 100.0% |
| Dunsmuir | CA | 1,618 | 1,618 | 0.2% | 100.0% |
| Sunnyside-Tahoe City | CA | 1,557 | 1,557 | 0.2% | 100.0% |
| Monument Hills | CA | 1,542 | 1,542 | 0.2% | 100.0% |
| Rancho Tehama Reserve | CA | 1,485 | 1,485 | 0.2% | 100.0% |
| Foresthill | CA | 1,483 | 1,483 | 0.2% | 100.0% |
| Tahoe Vista | CA | 1,433 | 1,433 | 0.2% | 100.0% |
| Berry Creek | CA | 1,424 | 1,424 | 0.2% | 100.0% |
| Dunnigan | CA | 1,416 | 1,416 | 0.2% | 100.0% |
| Janesville | CA | 1,408 | 1,408 | 0.2% | 100.0% |
| Beale AFB | CA | 1,319 | 1,319 | 0.1% | 100.0% |
| Palo Cedro | CA | 1,269 | 1,269 | 0.1% | 100.0% |
| Dollar Point | CA | 1,215 | 1,215 | 0.1% | 100.0% |
| Lewiston | CA | 1,193 | 1,193 | 0.1% | 100.0% |
| Tahoma | CA | 1,191 | 1,191 | 0.1% | 100.0% |
| Happy Camp | CA | 1,190 | 1,190 | 0.1% | 100.0% |
| Forest Ranch | CA | 1,184 | 1,184 | 0.1% | 100.0% |
| Montague | CA | 1,170 | 1,170 | 0.1% | 100.0% |
| Challenge-Brownsville | CA | 1,148 | 1,148 | 0.1% | 100.0% |
| Greenville | CA | 1,129 | 1,129 | 0.1% | 100.0% |
| Maxwell | CA | 1,103 | 1,103 | 0.1% | 100.0% |
| McCloud | CA | 1,101 | 1,101 | 0.1% | 100.0% |
| Butte Creek Canyon | CA | 1,086 | 1,086 | 0.1% | 100.0% |
| Grizzly Flats | CA | 1,066 | 1,066 | 0.1% | 100.0% |
| Gerber | CA | 1,060 | 1,060 | 0.1% | 100.0% |
| Johnstonville | CA | 1,024 | 1,024 | 0.1% | 100.0% |
| Knights Landing | CA | 995 | 995 | 0.1% | 100.0% |
| Rough and Ready | CA | 963 | 963 | 0.1% | 100.0% |
| Mountain Gate | CA | 943 | 943 | 0.1% | 100.0% |
| Butte Valley | CA | 899 | 899 | 0.1% | 100.0% |
| Tulelake | CA | 857 | 857 | 0.1% | 100.0% |
| Cohasset | CA | 847 | 847 | 0.1% | 100.0% |
| Dorris | CA | 817 | 817 | 0.1% | 100.0% |
| Graeagle | CA | 737 | 737 | 0.1% | 100.0% |
| Millville | CA | 727 | 727 | 0.1% | 100.0% |
| Walker | CA | 721 | 721 | 0.1% | 100.0% |
| Douglas City | CA | 713 | 713 | 0.1% | 100.0% |
| Loyalton | CA | 712 | 712 | 0.1% | 100.0% |
| Concow | CA | 710 | 710 | 0.1% | 100.0% |
| Delleker | CA | 705 | 705 | 0.1% | 100.0% |
| Patton Village | CA | 702 | 702 | 0.1% | 100.0% |
| Junction City | CA | 680 | 680 | 0.1% | 100.0% |
| Doyle | CA | 678 | 678 | 0.1% | 100.0% |
| Fort Jones | CA | 669 | 669 | 0.1% | 100.0% |
| Bangor | CA | 646 | 646 | 0.1% | 100.0% |
| Etna | CA | 643 | 643 | 0.1% | 100.0% |
| Dobbins | CA | 624 | 624 | 0.1% | 100.0% |
| Bend | CA | 619 | 619 | 0.1% | 100.0% |
| Alta | CA | 610 | 610 | 0.1% | 100.0% |
| Bridgeport | CA | 575 | 0 | 0.1% | 0.0% |
| Fall River Mills | CA | 573 | 573 | 0.1% | 100.0% |
| Hamilton Branch | CA | 537 | 537 | 0.1% | 100.0% |
| Coloma | CA | 529 | 529 | 0.1% | 100.0% |
| Carnelian Bay | CA | 524 | 524 | 0.1% | 100.0% |
| California Pines | CA | 520 | 520 | 0.1% | 100.0% |
| Cedarville | CA | 514 | 514 | 0.1% | 100.0% |
| Madison | CA | 503 | 503 | 0.1% | 100.0% |
| Coleville | CA | 495 | 495 | 0.1% | 100.0% |
| Sierra Brooks | CA | 478 | 478 | 0.1% | 100.0% |
| Meadow Valley | CA | 464 | 464 | 0.1% | 100.0% |
| Lakehead | CA | 461 | 461 | 0.1% | 100.0% |
| Chilcoot-Vinton | CA | 454 | 454 | 0.1% | 100.0% |
| Keswick | CA | 451 | 451 | 0.1% | 100.0% |
| Yolo | CA | 450 | 450 | 0.1% | 100.0% |
| Newell | CA | 449 | 449 | 0.1% | 100.0% |
| Cold Springs | CA | 446 | 0 | 0.1% | 0.0% |
| Tehama | CA | 436 | 436 | 0.1% | 100.0% |
| Beckwourth | CA | 432 | 432 | 0.1% | 100.0% |
| Lake Almanor Country Club | CA | 419 | 419 | 0.1% | 100.0% |
| Grimes | CA | 391 | 391 | 0.0% | 100.0% |
| Honcut | CA | 370 | 370 | 0.0% | 100.0% |
| Grenada | CA | 367 | 367 | 0.0% | 100.0% |
| Meridian | CA | 358 | 358 | 0.0% | 100.0% |
| Lake Almanor Peninsula | CA | 356 | 356 | 0.0% | 100.0% |
| Rio Oso | CA | 356 | 356 | 0.0% | 100.0% |
| Manton | CA | 347 | 347 | 0.0% | 100.0% |
| French Gulch | CA | 346 | 346 | 0.0% | 100.0% |
| Plumas Eureka | CA | 339 | 339 | 0.0% | 100.0% |
| McArthur | CA | 338 | 338 | 0.0% | 100.0% |
| Yankee Hill | CA | 333 | 333 | 0.0% | 100.0% |
| Robbins | CA | 323 | 323 | 0.0% | 100.0% |
| Nord | CA | 320 | 320 | 0.0% | 100.0% |
| Forbestown | CA | 320 | 320 | 0.0% | 100.0% |
| Canby | CA | 315 | 315 | 0.0% | 100.0% |
| Bieber | CA | 312 | 312 | 0.0% | 100.0% |
| Hat Creek | CA | 309 | 309 | 0.0% | 100.0% |
| Richfield | CA | 306 | 306 | 0.0% | 100.0% |
| Princeton | CA | 303 | 303 | 0.0% | 100.0% |
| Herlong | CA | 298 | 298 | 0.0% | 100.0% |
| Trinity Village | CA | 297 | 297 | 0.0% | 100.0% |
| Iron Horse | CA | 297 | 297 | 0.0% | 100.0% |
| Stirling City | CA | 295 | 295 | 0.0% | 100.0% |
| Artois | CA | 295 | 295 | 0.0% | 100.0% |
| College City | CA | 290 | 290 | 0.0% | 100.0% |
| Downieville | CA | 282 | 282 | 0.0% | 100.0% |
| Adin | CA | 272 | 272 | 0.0% | 100.0% |
| Lake Almanor West | CA | 270 | 270 | 0.0% | 100.0% |
| North San Juan | CA | 269 | 269 | 0.0% | 100.0% |
| Proberta | CA | 267 | 267 | 0.0% | 100.0% |
| Trinity Center | CA | 267 | 267 | 0.0% | 100.0% |
| Cromberg | CA | 261 | 261 | 0.0% | 100.0% |
| Guinda | CA | 254 | 254 | 0.0% | 100.0% |
| Hornbrook | CA | 248 | 248 | 0.0% | 100.0% |
| Richvale | CA | 244 | 244 | 0.0% | 100.0% |
| Vina | CA | 237 | 237 | 0.0% | 100.0% |
| Greenhorn | CA | 236 | 236 | 0.0% | 100.0% |
| Trowbridge | CA | 226 | 226 | 0.0% | 100.0% |
| East Nicolaus | CA | 225 | 225 | 0.0% | 100.0% |
| Lee Vining | CA | 222 | 0 | 0.0% | 0.0% |
| Sierra City | CA | 221 | 0 | 0.0% | 0.0% |
| Coffee Creek | CA | 217 | 217 | 0.0% | 100.0% |
| Nicolaus | CA | 211 | 211 | 0.0% | 100.0% |
| Markleeville | CA | 210 | 210 | 0.0% | 100.0% |
| Cassel | CA | 207 | 207 | 0.0% | 100.0% |
| Calpine | CA | 205 | 205 | 0.0% | 100.0% |
| Rackerby | CA | 204 | 204 | 0.0% | 100.0% |
| Greenview | CA | 201 | 201 | 0.0% | 100.0% |
| Sierraville | CA | 200 | 200 | 0.0% | 100.0% |
| Mesa Vista | CA | 200 | 200 | 0.0% | 100.0% |
| Lodoga | CA | 197 | 197 | 0.0% | 100.0% |
| Crescent Mills | CA | 196 | 196 | 0.0% | 100.0% |
| Litchfield | CA | 195 | 195 | 0.0% | 100.0% |
| Las Flores | CA | 187 | 187 | 0.0% | 100.0% |
| Washington | CA | 185 | 185 | 0.0% | 100.0% |
| Daphnedale Park | CA | 184 | 184 | 0.0% | 100.0% |
| Spaulding | CA | 178 | 178 | 0.0% | 100.0% |
| Smartsville | CA | 177 | 177 | 0.0% | 100.0% |
| Fort Bidwell | CA | 173 | 173 | 0.0% | 100.0% |
| Mono City | CA | 172 | 0 | 0.0% | 0.0% |
| Clear Creek | CA | 169 | 169 | 0.0% | 100.0% |
| Milford | CA | 167 | 167 | 0.0% | 100.0% |
| Elk Creek | CA | 163 | 163 | 0.0% | 100.0% |
| Montgomery Creek | CA | 163 | 163 | 0.0% | 100.0% |
| Verdi | CA | 162 | 162 | 0.0% | 100.0% |
| Mabie | CA | 161 | 161 | 0.0% | 100.0% |
| Dutch Flat | CA | 160 | 160 | 0.0% | 100.0% |
| Mohawk Vista | CA | 159 | 159 | 0.0% | 100.0% |
| Kirkwood | CA | 158 | 0 | 0.0% | 0.0% |
| Camptonville | CA | 158 | 158 | 0.0% | 100.0% |
| East Shore | CA | 156 | 156 | 0.0% | 100.0% |
| Round Mountain | CA | 155 | 155 | 0.0% | 100.0% |
| C-Road | CA | 150 | 150 | 0.0% | 100.0% |
| Stonyford | CA | 149 | 149 | 0.0% | 100.0% |
| Kingvale | CA | 143 | 143 | 0.0% | 100.0% |
| Clipper Mills | CA | 142 | 142 | 0.0% | 100.0% |
| Taylorsville | CA | 140 | 140 | 0.0% | 100.0% |
| Pike | CA | 134 | 134 | 0.0% | 100.0% |
| Macdoel | CA | 133 | 133 | 0.0% | 100.0% |
| Carrick | CA | 131 | 131 | 0.0% | 100.0% |
| Mineral | CA | 123 | 123 | 0.0% | 100.0% |
| Bear Valley | CA | 121 | 0 | 0.0% | 0.0% |
| Alpine Village | CA | 114 | 0 | 0.0% | 0.0% |
| Whitehawk | CA | 113 | 113 | 0.0% | 100.0% |
| Paskenta | CA | 112 | 112 | 0.0% | 100.0% |
| Valley Ranch | CA | 109 | 109 | 0.0% | 100.0% |
| Big Bend | CA | 102 | 102 | 0.0% | 100.0% |
| Flournoy | CA | 101 | 101 | 0.0% | 100.0% |
| New Pine Creek | CA | 98 | 98 | 0.0% | 100.0% |
| Mount Hebron | CA | 95 | 95 | 0.0% | 100.0% |
| Lookout | CA | 84 | 84 | 0.0% | 100.0% |
| Twain | CA | 82 | 82 | 0.0% | 100.0% |
| Soda Springs | CA | 81 | 81 | 0.0% | 100.0% |
| Gold Mountain | CA | 80 | 80 | 0.0% | 100.0% |
| Robinson Mill | CA | 80 | 80 | 0.0% | 100.0% |
| Floriston | CA | 73 | 73 | 0.0% | 100.0% |
| Gazelle | CA | 70 | 70 | 0.0% | 100.0% |
| Cherokee | CA | 69 | 69 | 0.0% | 100.0% |
| Goodyears Bar | CA | 68 | 68 | 0.0% | 100.0% |
| Clio | CA | 66 | 66 | 0.0% | 100.0% |
| Keddie | CA | 66 | 66 | 0.0% | 100.0% |
| Likely | CA | 63 | 63 | 0.0% | 100.0% |
| Lake City | CA | 61 | 61 | 0.0% | 100.0% |
| Eagleville | CA | 59 | 59 | 0.0% | 100.0% |
| Alleghany | CA | 58 | 58 | 0.0% | 100.0% |
| Paynes Creek | CA | 57 | 57 | 0.0% | 100.0% |
| Indian Falls | CA | 54 | 54 | 0.0% | 100.0% |
| Old Station | CA | 51 | 51 | 0.0% | 100.0% |
| Nubieber | CA | 50 | 50 | 0.0% | 100.0% |
| Topaz | CA | 50 | 50 | 0.0% | 100.0% |
| Sattley | CA | 49 | 49 | 0.0% | 100.0% |
| Lake Davis | CA | 45 | 45 | 0.0% | 100.0% |
| Edgewood | CA | 43 | 43 | 0.0% | 100.0% |
| Tennant | CA | 41 | 41 | 0.0% | 100.0% |
| Butte Meadows | CA | 40 | 40 | 0.0% | 100.0% |
| Blairsden | CA | 39 | 39 | 0.0% | 100.0% |
| Prattville | CA | 33 | 33 | 0.0% | 100.0% |
| Canyondam | CA | 31 | 31 | 0.0% | 100.0% |
| La Porte | CA | 26 | 26 | 0.0% | 100.0% |
| Belden | CA | 22 | 22 | 0.0% | 100.0% |
| Johnsville | CA | 20 | 20 | 0.0% | 100.0% |
| Spring Garden | CA | 16 | 16 | 0.0% | 100.0% |
| Paxton | CA | 14 | 14 | 0.0% | 100.0% |
| Tobin | CA | 12 | 12 | 0.0% | 100.0% |
| Graniteville | CA | 11 | 11 | 0.0% | 100.0% |
| Bucks Lake | CA | 10 | 10 | 0.0% | 100.0% |
| Storrie | CA | 4 | 4 | 0.0% | 100.0% |
| Little Grass Valley | CA | 2 | 2 | 0.0% | 100.0% |
| Warner Valley | CA | 2 | 2 | 0.0% | 100.0% |
| Caribou | CA | 0 | 0 | 0.0% | 100.0% |
| Almanor | CA | 0 | 0 | 0.0% | 100.0% |
City population is shown in full. The share of each city inside 837 is measured from Census tract centroids, not estimated from a rate-center match – so a city split between two codes appears on both, at the fraction each one actually holds. The “% of listed-city population” column uses the full populations of the cities listed here.
What counties does area code 837 cover?
1,812,653 residents across 20 counties, counted inside the 837 boundary — a county split between codes contributes only its part.
| County | State | Population in 837 | % of area-code footprint | % of County |
|---|---|---|---|---|
| Sacramento County | CA | 449,996 | 25% | 28% |
| Yolo County | CA | 215,002 | 12% | 99% |
| Butte County | CA | 211,632 | 12% | 100% |
| Shasta County | CA | 182,155 | 10% | 100% |
| El Dorado County | CA | 145,245 | 8% | 76% |
| Nevada County | CA | 102,241 | 6% | 100% |
| Sutter County | CA | 99,633 | 5% | 100% |
| Yuba County | CA | 81,575 | 5% | 100% |
| Placer County | CA | 76,654 | 4% | 19% |
| Tehama County | CA | 65,829 | 4% | 100% |
| Siskiyou County | CA | 44,076 | 2% | 100% |
| Lassen County | CA | 32,730 | 2% | 100% |
| Glenn County | CA | 28,917 | 2% | 100% |
| Colusa County | CA | 21,839 | 1% | 100% |
| Plumas County | CA | 19,790 | 1% | 100% |
| Trinity County | CA | 16,112 | 1% | 100% |
| Modoc County | CA | 8,700 | 0% | 100% |
| Humboldt County | CA | 6,087 | 0% | 4% |
| Sierra County | CA | 3,236 | 0% | 100% |
| Alpine County | CA | 1,204 | 0% | 100% |
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 837 been reported for unwanted calls?
Yes – 2 unwanted-call complaints were reported to the FTC for numbers showing a 837 area code (Jun 8 – Aug 3, 2026).
- 100% robocalls
- → 0% vs prior period
Most-reported subjects
- Other100%2
Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-08-17.
Frequently Asked Questions about the 837 Area Code
Who called me from a 837 number?
A 837 number is assigned to Redding, California, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 837 code to look nearby, so a 837 number doesn't prove the caller is local. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 837 code (100% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 837 a scam area code?
No area code is a scam on its own. 837 is a normal, officially assigned code for Redding, California. Spam callers spoof local codes to raise the odds you answer, so 837 on your caller ID says nothing about who is really calling. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 837 code (100% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 837 area code?
Repeated calls from different 837 numbers are usually spoofing: a robocaller rotates through 837 numbers so each call looks local and slips past simple blocks. Recently, 2 unwanted-call complaints were reported to the FTC for numbers showing the 837 code (100% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 837 number?
If you aren't expecting a 837 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 837 area code?
Block a single 837 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 837 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 837?
Area code 837 covers Redding and the surrounding area in California, spanning 278 cities with about 1,812,653 residents. It shares its area with overlay code 530.
When did area code 837 go into service?
Area code 837 went into service on January 31, 2025. It was added as an overlay of 530, so 837 numbers serve the same area that 530 already covered.
Is 837 a real area code?
Yes. 837 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Redding, California. A real code can still show up on spoofed spam calls, so treat unknown 837 calls with normal caution.
What timezone is the 837 area code in?
The 837 area code is in the Pacific Time (PT). Because a number can be kept when someone moves or switches to VoIP, a specific 837 caller may not be in that zone.
How do I call a 837 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 837 and the seven-digit number. From a mobile phone you can usually just enter +1 837 followed by the number and let the phone add the exit code for you.