Is It Illegal to Withhold Your Number in the UK? (2026 Laws)
Understand the UK laws surrounding private numbers, harassment, and when withholding your caller ID crosses the legal line.
Quick Answer
Withholding your number is not inherently illegal in the UK under Ofcom rules. However, using a withheld number to repeatedly harass, threaten, or cause distress violates the Protection from Harassment Act 1997. Use PrivStop to unmask these calls and gather evidence for the police.
The Legality of "No Caller ID"
Many people wonder if it's actually illegal for someone to hide their phone number when calling. In the UK, the short answer is no. Under Ofcom regulations, individuals and businesses have the right to withhold their Caller Line Identification (CLI) for privacy reasons.
When Does It Become Illegal?
The act of hiding the number isn't the crime—it's what the caller does next. If a withheld number is used to make malicious, threatening, or persistently annoying calls, it crosses into criminal territory.
- Protection from Harassment Act 1997: This law makes it a criminal offense to pursue a course of conduct that amounts to harassment.
- Communications Act 2003 (Section 127): Sending by means of a public electronic communications network a message or other matter that is grossly offensive or of an indecent, obscene or menacing character is illegal.
Taking Action in 2026
If you are receiving illegal harassment from a private number, the police will ask for evidence. This is where PrivStop is critical. By instantly unmasking the withheld number, you gain the exact phone number and timestamp logs required by UK law enforcement to trace the perpetrator and file a formal report.