By NoCall Team

A hidden number is calling me: what it means and what to do

The screen shows «hidden number», «private», or «unknown» instead of the caller phone number. It is one of the situations that breeds the most distrust: among the more than 4 reports from the NoCall community, calls with no visible identity show up frequently.

1. Who calls with a hidden number

LegitimateDoctors, company switchboards, security forces, and public services protecting their privacy.
SuspiciousScammers hiding their number so you cannot identify them, look them up, or call back.

2. Should I answer?

If you are expecting a call (doctor, courier, interview), answer cautiously. If you are not expecting anything, you can let it ring: anyone with something legitimate to tell you will leave a voicemail or reach you through another channel.

3. What never to do

  • Never give personal, banking, or SMS-code data to a hidden number.
  • Never follow urgent instructions («make a transfer now», «install this app»).
  • Do not call back: with no visible number, there is nothing to verify.

4. Blocking hidden calls

On iPhone, «Silence Unknown Callers»; on Android, the Phone app spam filter. If you still get suspicious calls from visible numbers, look them up on NoCall and read what to do about a suspicious call.

Perguntas frequentes

Who can call me with a hidden number?+

Doctors, companies with switchboards, security forces, and some public services call with hidden numbers for privacy. But scammers use it too, so you cannot identify them or call back.

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 legitimate, the caller will leave a message or identify themselves. Your carrier only discloses the number after a police report.

How do I block hidden-number calls?+

Both iPhone and Android can silence or block calls from unknown or hidden numbers in the phone settings. You can also turn on NoCall automatic filtering.

Pesquise um número de telefone ou um nome de empresa (EDP, MEO e NOS...) para verificar se foi denunciado como spam.

A hidden number is calling me: what it means and what to do | NoCall