Whose number is this?
An unknown number on your screen is a decision, not a mystery: answer, ignore, or call back. You can make that decision well in under a minute without knowing the caller's name.
Decide in three signals
Work from the pattern rather than the number. These three signals resolve almost every unknown call Australians ask us about.
- Did they leave anything? Genuine callers leave a voicemail, an SMS, or try again. Silence is the signature of a dialler.
- What is the format? 190x is premium rate and never worth returning; 1800 and 1300 are business lines; a mobile or state landline could be anyone.
- What did others get? A page of matching reports settles it immediately.
Why your phone shows a number it cannot verify
Caller ID is data supplied by the calling network, not a credential your handset checks. That is why a call can display a bank's real published number, and why 'the number looked legitimate' is never a reason to trust a request for money, codes or device access.
Australian carriers block enormous volumes of clearly fraudulent traffic before it reaches handsets, but display names and numbers on the calls that do arrive still deserve scepticism.
If it turns out to be unwanted
Block the number on your handset, register on the Do Not Call Register at donotcall.gov.au if you have not already, and report the call to Scamwatch at scamwatch.gov.au when money or credentials were involved. Then leave a report here, so the next Australian who searches the number gets an answer instead of a blank page.