Caller ID spoofing: why scammers show a local number and how to protect yourself

Concerns & risks

Your phone shows local-looking numbers and even your bank's name for scam calls.

Causes & evidence

The Federal Communications Commission explains that spoofing is when a caller deliberately falsifies the information sent to your caller ID display to disguise their identity. Scammers often use neighbor spoofing, showing a number that looks local, because people are more likely to answer. Under the Truth in Caller ID Act, FCC rules prohibit anyone from transmitting misleading or inaccurate caller ID information with the intent to defraud, cause harm or wrongly obtain anything of value. Spoofing isn't always illegal; a doctor calling from a personal phone may show the office number, for instance. The FCC advises not answering calls from unknown numbers, hanging up if you do, never giving out personal information, and calling back using a number from your statement or an official website. Carriers use caller ID authentication, known as STIR/SHAKEN, to flag likely spoofed calls, but it doesn't catch all of them.

Edge cases: if people say your number called them, you're likely being spoofed; scammers usually switch numbers quickly. Set a voicemail password so spoofers can't access it. Legitimate agencies typically send mail before calling about payments.

Trusting a familiar name on the screen is the mistake; spoofed caller ID can show any name, including your bank or a government agency.

What to do

1. Let unknown calls go to voicemail.
2. If a caller claims to be your bank or an agency, hang up.
3. Call back using the number on your card, statement or the official site.
4. Never share passwords, PINs or one-time codes by phone.
5. Turn on your carrier's free call-blocking or spam labeling.
6. Report spoofed calls to the FCC and scams to ReportFraud.ftc.gov.

Common mistakes:

• Trusting caller ID names
• Pressing a number to be removed from a list
• Calling back the number that called you
• Giving codes to someone who called you

ReportSpeedMan tip: My rule: if they called me, I call them back on a number I find myself. It takes one minute and defeats spoofing every time.

What I would actually do

I'd send unknown calls to voicemail, turn on carrier spam labeling, and verify any bank or agency call through the number on my card.

The trade-off people miss: ignoring unknown numbers may delay a legitimate call, but real callers leave messages and you can call back safely.

How to tell it worked

You verify every unexpected call through a number you looked up.

Quick FAQ

Can I stop my number being spoofed?
Not directly; it usually passes.

Is blocking my number spoofing?
No.

Does STIR/SHAKEN stop all of it?
No, it helps carriers flag calls.

Wrap-up: Caller ID can be faked, and spoofing to defraud is illegal. Verify by calling back on a number you look up yourself.

Wiki: Robocalls and the Do Not Call Registry and Payment App and Money Scams.

Caller ID spoofing: official pages behind this answer

• FCC: Caller ID spoofing
• FCC: Combating spoofed robocalls with caller ID authentication