What Is CLI Spoofing?
CLI spoofing is a technique scammers use to manipulate the Caller Line Identification (CLI) information displayed on your phone. Essentially, the number you see on your screen may not be the real number of the caller, making it harder to identify fraud.
⚠️ Scammers often use CLI spoofing to appear as local numbers, banks, government agencies,
or even friends and family. Always exercise caution if something feels suspicious.
How CLI Spoofing Works
- The scammer uses special software or VoIP services to change the outgoing caller ID.
- The number displayed on your phone may match a local area code, bank, or government office.
- When you answer, the scammer attempts to collect personal, financial, or sensitive information.
Common CLI Spoofing Scenarios in the UK
- Fake HMRC or tax office calls threatening fines or legal action.
- Bank impersonation calls requesting account verification.
- Local council or utility provider scams claiming overdue bills.
- Friend or family member spoofed numbers to trick victims into sending money.
How to Protect Yourself
- Do not trust the number displayed; always verify independently.
- Hang up immediately on suspicious or unexpected calls.
- Use call-blocking apps and enable spam filtering.
- Register with the Telephone Preference Service (TPS) to reduce marketing calls.
- Report suspicious numbers to Action Fraud or your provider.
Remember: Even if a call looks local or legitimate, CLI spoofing can make it fake.
Staying vigilant is the best protection.