Scam calls from 840 numbers

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

A 840 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.

Note that Pomona numbers may also show overlay codes 909 — a scammer rotating through the 840/909 complex still looks "local".

Reporting matters — FTC and FCC complaints are aggregated into enforcement actions against robocall operations.

Documented patterns behind 840-looking calls

Caller ID spoofing

The caller deliberately falsifies the number shown on your caller ID display to disguise their identity, often imitating a local number, a government agency, or a well-known company.

Signs: the displayed number looks local or familiar, but the caller is a stranger or a recording; a callback to the displayed number reaches someone who never called you. Full pattern →

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 →

One-ring (Wangiri) callback scam

Your phone rings once and stops. The scammer hopes curiosity makes you call back a number that routes to an international premium-rate line, generating per-minute charges that are shared with the scammer.

Signs: a missed call that rang only once, often late at night; repeated one-ring calls from the same or similar numbers. Full pattern →

IRS impersonation

A caller claims to be from the Internal Revenue Service, says you owe back taxes, and threatens arrest, deportation, or license revocation unless you pay immediately — typically by gift card, wire transfer, or cryptocurrency.

Signs: demands for immediate payment by gift card, prepaid debit card, wire, or crypto; threats of arrest or lawsuits for unpaid taxes. Full pattern →

Social Security impersonation

The caller pretends to be from the Social Security Administration and claims your Social Security number has been suspended or linked to a crime, pressuring you to confirm the number or move money to 'protect' it.

Signs: claims that your ssn has been 'suspended' — ssns are never suspended; requests to confirm your ssn or move money to gift cards or crypto for 'safekeeping'. Full pattern →

Reporting channels

FAQ

Are all calls from 840 numbers scams?

No — 119 real prefixes serve Pomona 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 840 area code?

Some phones and carrier apps allow prefix-based blocking, but scammers rotate codes (including overlays 909), so blanket blocking mostly costs you legitimate calls. Silencing unknown callers works better.

Where do I report a scam call from a 840 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.