Caller: Probably scanners or cold calling sales

Number identified as Campbelltown area, NSW. No message left.

This number is flagged as a spam number when calling my mobile.

Caller: I don’t know - scammers

They don’t leave a message & you can’t call back - scammers that have bought Australian numbers

I tried calling back and got an automatic message saying "The number that you dialed is invalid or incomplete". They did not leave me a message so I don't know who they were claiming to be.

Didn't leave a message and upon calling back you get the message that the number you have called is invalid or incomplete, please check the number and try again.

WHEN I tried calling back it said number invalid or incomplete. Weird,, obviously they know how to work around caller ID.

Putting it down as a definite spam/scam number

no message left