603 Area Code Scam Report
Area Code 603
The 603 area code covers Area Code 603 and ranks #141 out of all U.S. area codes for scam call complaints. The FTC has logged 45,639 complaints from 22,293 unique phone numbers in the 603 prefix. The FCC independently recorded another 1,324 complaints, meaning people are reporting these numbers to multiple federal agencies.
But here is what makes 603 distinctive: 61.7% of victims are New Hampshire residents, and 67% of victims have a 603 number themselves. This is a textbook neighbor spoofing pattern. Scammers fake a 603 caller ID because people in the New Hampshire 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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603 Area Code at a Glance
45,639
2 per number avg
1,324
independent federal source
61.7%
target New Hampshire residents
#141
of all U.S. area codes
Why Scammers Spoof 603 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 603 because it is a large, recognizable New Hampshire area code. When your phone rings and shows a 603 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 603 numbers:
- 61.7% of victims are in New Hampshire, confirming local targeting
- 67% of victims have a 603 number themselves, meaning scammers match the victim's own area code
- The remaining 38% of complaints come from all 50 states, showing these numbers also appear in broader campaigns
What 603 Scam Calls Are About
Not all 603 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.
Warranties & protection plans scams have the highest automation rate at 80.8%, meaning 8 out of 10 calls are robots. Reducing your debt (credit cards, mortgage, student loans) follows at 74.5%. If your phone rings from a 603 number and you hear a recorded message about debt, tech support, or a government agency, it is almost certainly spoofed.
Medical & prescriptions
4,775 complaints
71.4%
robocall rate
Calls pretending to be government, businesses, or family and friends
4,127 complaints
66.7%
robocall rate
Warranties & protection plans
2,357 complaints
80.8%
robocall rate
Reducing your debt (credit cards, mortgage, student loans)
2,056 complaints
74.5%
robocall rate
Energy, solar, & utilities
702 complaints
55.4%
robocall rate
Charities
694 complaints
46.4%
robocall rate
Most Reported 603 Numbers
These 603 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 603 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 603 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 New Hampshire Scam Call Cluster
603 does not exist in isolation. The entire New Hampshire metro shares five area codes, and scammers rotate through all of them. Combined, these codes account for 45,639 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 61.7%. This suggests 817 is used almost exclusively for neighbor spoofing, while 469 sees slightly more use in broader nationwide campaigns.
Where This Data Comes From
Every number on this page comes from federal complaint databases, not estimates or surveys. When you check a specific 603 number on ScamVerify™, we cross-reference these sources in real time along with carrier intelligence and community reports.
- FTC Do Not Call Registry - 45,639 complaints from 603 numbers. Consumers file these when they receive unwanted calls, especially from numbers on the Do Not Call list.
- FCC Consumer Complaints - 1,324 complaints from 603 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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