Scam calls from 423 numbers

Patterns documented by FTC/FCC · numbering data as of July 28, 2026.

A 423 caller ID is easy to fake. Neighbor spoofing — matching your area code and even your prefix — is designed to get local-looking calls answered. The schemes below are documented by the FTC and FCC and map what typically hides behind such calls.

The same territory answers to 729 as well, so spoofers rotate codes within the overlay complex to defeat simple blocking.

If any of these match a call you received, report it: the FTC's fraud reports and the FCC's complaint center are the channels that feed enforcement.

Documented patterns behind 423-looking calls

Neighbor spoofing

A form of caller ID spoofing in which the falsified number matches your own area code and often your NXX prefix, so the call appears to come from a nearby household and feels safe to answer.

Signs: the incoming number shares your area code and first three digits of your local number; answering leads to a robocall, silence, or a sales/scam pitch. Full pattern →

Auto warranty robocall

Prerecorded calls about your car's 'expiring warranty' push overpriced or worthless service contracts. The FCC has taken enforcement action against major auto-warranty robocall operations.

Signs: recording mentions 'your vehicle's extended warranty' without naming your car; pressure to 'press 1' to speak with a 'warranty specialist'. Full pattern →

Charity fraud calls

Fundraising calls for fake charities, or for real-sounding causes where almost nothing reaches the beneficiaries. These spike after disasters and around holidays.

Signs: high-pressure appeals tied to a recent disaster; vague answers about how donations are used. Full pattern →

Student loan 'forgiveness' scam

Callers promise loan forgiveness or special repayment programs for an upfront fee, or phish for your FSA ID — which lets them take over your federal student aid account.

Signs: upfront fees for 'enrollment' in forgiveness programs; requests for your fsa id username and password. Full pattern →

Package delivery callback scam

A call or voicemail claims a package could not be delivered and asks you to call back or 'press 1', leading to phishing for personal data or premium-rate charges. The same lure is common by text (smishing).

Signs: delivery notice for a package you never ordered; callback number that does not match the carrier's official lines. Full pattern →

Immigration (USCIS) impersonation

Callers impersonate USCIS or 'immigration officers', claim a problem with your status or paperwork, and demand payment or personal information under threat of deportation.

Signs: threats of deportation unless a 'fee' is paid by phone; spoofed caller id showing uscis numbers. Full pattern →

Reporting channels

• FTC ReportFraud
• FTC Do Not Call Registry
• FCC Consumer Complaint Center

FAQ

Are all calls from 423 numbers scams?

No — 758 real prefixes serve Chattanooga subscribers. The point is that the displayed code alone proves nothing either way; judge the call's content and verify independently.

Can I block the whole 423 area code?

Some phones and carrier apps allow prefix-based blocking, but scammers rotate codes (including overlays 729), so blanket blocking mostly costs you legitimate calls. Silencing unknown callers works better.

Where do I report a scam call from a 423 number?

File at ReportFraud.ftc.gov (fraud and losses) and the FCC Consumer Complaint Center (spoofing and robocalls). Include the displayed number, date and what was said.