231 Area Code Scam Report
Area Code 231
The 231 area code covers Area Code 231 and ranks #153 out of all U.S. area codes for scam call complaints. The FTC has logged 43,909 complaints from 20,584 unique phone numbers in the 231 prefix. The FCC independently recorded another 1,046 complaints, meaning people are reporting these numbers to multiple federal agencies.
But here is what makes 231 distinctive: 58.5% of victims are Michigan residents, and 36% of victims have a 231 number themselves. This is a textbook neighbor spoofing pattern. Scammers fake a 231 caller ID because people in the Michigan area are far more likely to answer a call that looks like it is coming from their own neighborhood. The number on your screen is fabricated.
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231 Area Code at a Glance
43,909
2.1 per number avg
1,046
independent federal source
58.5%
target Michigan residents
#153
of all U.S. area codes
Why Scammers Spoof 231 Numbers
Caller ID spoofing is trivially easy with modern VoIP technology. Scammers operating from anywhere in the world can make your phone display any number they choose. They pick 231 because it is a large, recognizable Michigan area code. When your phone rings and shows a 231 number, your instinct is that it might be a local business, a doctor's office, or someone you know. That instinct is exactly what scammers exploit.
The data confirms this. Of all FTC complaints about 231 numbers:
- 58.5% of victims are in Michigan, confirming local targeting
- 36% of victims have a 231 number themselves, meaning scammers match the victim's own area code
- The remaining 42% of complaints come from all 50 states, showing these numbers also appear in broader campaigns
What 231 Scam Calls Are About
Not all 231 scam calls run the same playbook. The FTC categorizes complaints by subject, and the automation rate (robocall percentage) reveals which scams are run by machines versus live callers.
Reducing your debt (credit cards, mortgage, student loans) scams have the highest automation rate at 88.2%, meaning 9 out of 10 calls are robots. Warranties & protection plans follows at 74.5%. If your phone rings from a 231 number and you hear a recorded message about debt, tech support, or a government agency, it is almost certainly spoofed.
Reducing your debt (credit cards, mortgage, student loans)
5,898 complaints
88.2%
robocall rate
Medical & prescriptions
3,114 complaints
54.9%
robocall rate
Calls pretending to be government, businesses, or family and friends
3,110 complaints
68.7%
robocall rate
Warranties & protection plans
941 complaints
74.5%
robocall rate
Charities
450 complaints
51.1%
robocall rate
Energy, solar, & utilities
336 complaints
65.5%
robocall rate
Most Reported 231 Numbers
These 231 numbers have the highest FTC complaint counts. Click any number to see the full scam report with carrier data, complaint history, and AI risk analysis.
What to Do If You Get a Call from a 231 Number
If you did not answer
Do not call back. Scammers spoof real people's numbers, so calling back may reach an innocent person. Instead, check the number on ScamVerify™ to see if it has been reported. If there is no voicemail, it was almost certainly a robocall.
If you answered
Hang up immediately if you hear a recorded message. If a live person asks for personal information, payment, or claims to be from the IRS, Social Security, or your bank, do not engage. Legitimate agencies do not cold-call demanding immediate payment. Check the number below, then report it to the FTC at donotcall.gov.
Remember: the number is not real
The 231 number that appeared on your screen was almost certainly spoofed. The actual caller could be anywhere. This is why blocking individual numbers has limited value. Scammers generate thousands of spoofed numbers and discard them after a few calls.
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The Michigan Scam Call Cluster
231 does not exist in isolation. The entire Michigan metro shares five area codes, and scammers rotate through all of them. Combined, these codes account for 43,909 FTC complaints, making DFW one of the most spoofed metro areas in the country.
Fort Worth's 817 has the highest in-state targeting rate at 84%, while 469 sits at 58.5%. This suggests 817 is used almost exclusively for neighbor spoofing, while 469 sees slightly more use in broader nationwide campaigns.
313
Area Code 313
53,150 complaints
54.1% target Michigan
248
Area Code 248
49,592 complaints
78.6% target Michigan
734
Area Code 734
40,781 complaints
70.9% target Michigan
586
Area Code 586
33,844 complaints
75.3% target Michigan
616
Area Code 616
33,746 complaints
75.1% target Michigan
989
Saginaw, MI
33,431 complaints
72.5% target Michigan
Where This Data Comes From
Every number on this page comes from federal complaint databases, not estimates or surveys. When you check a specific 231 number on ScamVerify™, we cross-reference these sources in real time along with carrier intelligence and community reports.
- FTC Do Not Call Registry - 43,909 complaints from 231 numbers. Consumers file these when they receive unwanted calls, especially from numbers on the Do Not Call list.
- FCC Consumer Complaints - 1,046 complaints from 231 numbers. An independent federal source that corroborates the FTC data.
- Carrier Intelligence - Real-time caller ID verification, line type detection, and STIR/SHAKEN attestation available when you check a specific number.
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