These area the top 10 area code 837 phone numbers reported to the FTC in the last 30 days:
| Phone Number | Complaints | Last Reported |
|---|---|---|
| (837) 791-7724 |
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.
Uses aggressive, repeated dead-air calls to coerce victims into unauthorized energy supplier switches.
"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."
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.
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.
| Rate Center | Number of Prefixes |
|---|