A private or hidden number is calling me: what it means and what to do
Your cellphone shows "Private number" or "Unknown" on an incoming call. Find out who calls with a hidden number and how to protect yourself.
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A private or hidden number is calling me: what it means and what to do
The screen shows "Private number", "No caller ID" or "Unknown" instead of the caller's number. It is one of the situations that causes the most distrust: in the reports from the NoCall community, calls with no visible number come up often.
1. Who calls with a hidden number
- Genuine callers: doctors and hospitals, company switchboards, the police and public services that keep their numbers private.
- Suspicious callers: scammers who hide their number so that you cannot identify them, look them up or call back. Some telemarketers do it too.
2. Should I answer?
If you are expecting a call (doctor, courier, job interview), answer carefully. If you are not expecting anything, you can let it ring: anyone with something genuine to tell you will leave a voicemail or reach you another way.
3. What never to do
- Never give personal or banking details, your ID number or an OTP to a hidden number.
- Never follow urgent instructions ("make an EFT now", "install this app").
- Do not try to call back: with no visible number, there is nothing to check.
4. Blocking hidden calls
On iPhone, use "Silence Unknown Callers"; on Android, the spam filter in the Phone app. If you still get suspicious calls from visible numbers, look them up on NoCall and read our step-by-step guides.
Who can call me with a hidden number?
Doctors, companies with switchboards, the police and some public services call with a hidden number for privacy. But scammers use it too, so that you cannot identify them or call back. If a company keeps calling you to sell something after you have asked it to stop, you can complain to the Information Regulator.
Can I find out who is calling from a hidden number?
Not directly: the number is never sent to your phone. If the call is genuine, the caller will leave a message or say who they are. Your network will not reveal it to you; if the calls turn into threats or harassment, open a case at your nearest police station (SAPS) so that the police can follow it up through the proper legal channels.
How do I block hidden-number calls?
Both iPhone and Android let you silence or block calls from unknown or hidden numbers in the phone settings. You can also switch on NoCall's automatic filtering.
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Article details
Editorial content reviewed by NoCall with practical context for spotting suspicious calls and messages.
Received a suspicious call?
Look up the number in NoCall before sharing data, calling back, or clicking any link.
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