This number called my mobile after 7pm AEDT and did not leave a message. Called this number back to receive "Optus advises that the number you have dialed has been disconnected." I would assume it is a telemarketing call surveying active phone numbers if this is the case, and advise against answering the phone.

I’ve had the same thing, happened yesterday afternoon, tried calling back but number was disconnected

Do not ring this number

Ignored call and then phoned back, Number has been disconnected.

Yeah we just got a very dodgy-sounding call from this number, asking about a very old email account from years ago saying they had a request to re-open an account. Beware!

I received it at 7:26pm on 03/10/2017 and same thing when I call back to receive "Optus advises that the number you have dialed has been disconnected."

This happened to me aswell (number disconnected) I kept declining this call as it they kept ringing back within 1minute multiple times. Who does this