Phone number spoofing is a technique where callers deliberately falsify the information transmitted to your caller ID display. This makes it appear as if the call is coming from a different number – often a local one or a well-known company.
How Does Spoofing Work?
Spoofing is surprisingly easy and accessible. VoIP (Voice over Internet Protocol) services allow callers to set any number they want as their outgoing caller ID. This technology was originally designed for legitimate business purposes, but scammers have weaponized it.
Why Do Scammers Spoof Numbers?
- To bypass call blocking – Since the number changes each time, blocking individual numbers is ineffective
- To appear local – People are more likely to answer calls from local area codes (known as neighbor spoofing)
- To impersonate trusted organizations – Making it appear the call comes from your bank or the IRS
- To avoid tracing – The real source of the call is hidden behind the spoofed number
Common Spoofing Scams
Government Impersonation
Scammers spoof government agency numbers (IRS, Social Security Administration) and threaten arrest or penalties unless you make an immediate payment.
Bank Fraud Alerts
A call appears to come from your bank, claiming suspicious activity on your account. They then ask you to verify your account details.
Tech Support Scams
Callers claim to be from Microsoft, Apple, or your internet provider, saying your device has a virus or security issue.
Neighbor Spoofing
The caller uses a number with the same area code and prefix as yours, making it look like a nearby neighbor or local business is calling.
How to Protect Yourself
- Be skeptical of caller ID – Remember that the number shown can be faked
- Never trust calls requesting immediate payment – Government agencies send written notices first
- Verify independently – If someone claims to be from your bank, hang up and call the number on the back of your card
- Use call screening apps – Many smartphone apps can detect and warn about potential spoofed calls
- Report spoofed calls – File complaints with the FCC (US) or Ofcom (UK)
Is Spoofing Legal?
In many countries, spoofing is only illegal when done with the intent to defraud or cause harm. In the United States, the Truth in Caller ID Act prohibits transmitting misleading caller ID information with the intent to defraud. Violations can result in fines up to $10,000 per call.
If you receive a suspicious call, look up the number on WhoCalledMe.io to see if others have reported it as spoofed or spam.