837 Phone Number Lookup

837 Phone Numbers Recently Reported as Spam

837 area code numbers reported as unwanted calls to the FTC in the last 30 days.

Phone Number	Complaints	Last Reported
(837) 309-6683	1	May 12, 2026

Common Area Code 837 Phone Scam

The 837 area code is currently linked to aggressive calls about switching electric companies. Telemarketers push hard to change your utility provider often without your clear permission.

• Electric Switching

Aggressive Electric Company Switching Calls

Callers from numbers showing "unknown name" on caller ID are making repeated attempts to get residents to switch electric companies. These robocallers hang up immediately if an answering machine picks up, call multiple times per day, and often leave only dead air when you answer. They use your interest or any information you provide to sign you up for a new electric supplier without proper authorization. One person reported 14 calls in a single week from the same number. Real utility companies send official communications by mail with clear company identification.

"Spammer to switch electric companies. Comes up as 'unknown name.' Called me 14 times over a week's period. I finally figured out how to block the number."

Where is area code 837 located?

The 837 area code covers a large portion of northeastern and Northern California, encompassing the Sacramento Valley, Shasta Cascade, and the northern Sierra Nevada regions.

Counties Served:

• Alpine
• Butte
• Colusa
• El Dorado
• Glenn
• Humboldt
• Lassen
• Modoc
• Mono
• Nevada
• Placer
• Plumas
• Shasta
• Sierra
• Siskiyou

Major Cities:

• Auburn
• Chico
• Colfax
• Davis
• Grass Valley
• Corning
• Marysville
• Oroville
• Paradise
• Placerville
• Redding
• Red Bluff
• Susanville
• Truckee
• Woodland

Other Cities and Towns:

• Adin
• Alleghany
• Almanor
• Alta
• Alta Sierra
• Alturas
• Alpine Village
• Anderson
• Applegate
• Arbuckle
• Artois
• Bangor
• Bear Valley
• Beale Air Force Base
• Beckwourth

Overlay System

Area code 837 is an overlay to area code 530 . Area code 530 was created in 1997 and area code 837 was added in 2025. Ten-digit dialing is already in effect.

FAQs About 837 Phone Numbers

Is area code 837 a scam?

No, 837 is a legitimate area code established as an overlay for the 530 region in northern California, serving cities like Redding and Chico. Scammers utilize this newer prefix to bypass blocked number lists while keeping their caller ID functionally local.

Why do I get spam calls from area code 837?

Operating within the established northern California territory means this code is abused by the exact same aggressive utility schemes. Telemarketers frequently spoof these digits to hound residents with rapid-fire calls attempting to switch their electric companies. One victim reported an astonishing fourteen calls in a single week from a persistent representative who refused to leave a message.

Other California Area Codes

Look up other California area code phone numbers:

• 209 Phone Number Lookup:
  Stockton, Modesto, Tracy
• 213 Phone Number Lookup:
  Los Angeles, East Los Angeles, Inglewood, South Gate
• 279 Phone Number Lookup:
  Sacramento, Elk Grove, Roseville
• 310 Phone Number Lookup:
  Los Angeles, Torrance, Inglewood, Compton
• 323 Phone Number Lookup:
  Los Angeles, East Los Angeles, Inglewood, South Gate
• 341 Phone Number Lookup:
  Oakland, Fremont, Hayward, Berkeley, Richmond
• 350 Phone Number Lookup:
  Stockton, Modesto, Tracy
• 357 Phone Number Lookup:
  
• 369 Phone Number Lookup:
  Santa Rosa, Vallejo, Fairfield
• 408 Phone Number Lookup:
  San Jose, Sunnyvale, Santa Clara
• 415 Phone Number Lookup:
  San Francisco, Daly City, San Rafael, Novato
• 424 Phone Number Lookup:
  Los Angeles, Torrance, Inglewood, Compton
• 442 Phone Number Lookup:
  Oceanside, Escondido, Victorville, Carlsbad
• 510 Phone Number Lookup:
  Oakland, Fremont, Hayward, Berkeley, Richmond
• 530 Phone Number Lookup:
  Redding, Chico, Davis
• 559 Phone Number Lookup:
  Fresno, Visalia, Clovis
• 562 Phone Number Lookup:
  Long Beach, Downey, Norwalk
• 619 Phone Number Lookup:
  San Diego, Chula Vista, El Cajon
• 626 Phone Number Lookup:
  Pasadena, El Monte, West Covina
• 628 Phone Number Lookup:
  San Francisco, Daly City, San Rafael, Novato
• 650 Phone Number Lookup:
  Daly City, San Mateo, Redwood City
• 657 Phone Number Lookup:
  Anaheim, Santa Ana, Irvine, Huntington Beach, Garden Grove, Orange, Fullerton, Costa Mesa
• 661 Phone Number Lookup:
  Bakersfield, Santa Clarita, Lancaster, Palmdale
• 669 Phone Number Lookup:
  San Jose, Sunnyvale, Santa Clara
• 707 Phone Number Lookup:
  Santa Rosa, Vallejo, Fairfield
• 714 Phone Number Lookup:
  Anaheim, Santa Ana, Irvine, Huntington Beach, Garden Grove, Orange, Fullerton, Costa Mesa
• 738 Phone Number Lookup:
  
• 747 Phone Number Lookup:
  Los Angeles, Glendale, Pasadena, Burbank
• 760 Phone Number Lookup:
  Oceanside, Escondido, Victorville, Carlsbad
• 805 Phone Number Lookup:
  Oxnard, Thousand Oaks, Simi Valley
• 818 Phone Number Lookup:
  Los Angeles, Glendale, Pasadena, Burbank
• 820 Phone Number Lookup:
  Oxnard, Thousand Oaks, Simi Valley
• 831 Phone Number Lookup:
  Salinas, Santa Cruz, Watsonville
• 840 Phone Number Lookup:
  San Bernardino, Fontana, Rancho Cucamonga, Ontario, Pomona
• 858 Phone Number Lookup:
  San Diego, Chula Vista, El Cajon
• 909 Phone Number Lookup:
  San Bernardino, Fontana, Rancho Cucamonga, Ontario, Pomona
• 916 Phone Number Lookup:
  Sacramento, Elk Grove, Roseville
• 925 Phone Number Lookup:
  Concord, Antioch, Livermore
• 949 Phone Number Lookup:
  Irvine, Costa Mesa, Mission Viejo, Newport Beach
• 951 Phone Number Lookup:
  Riverside, Moreno Valley, Corona, Murrieta, Temecula