Hung up immediately when I answered.

Male voice who hung up. Rang back from a landline with my ID hidden and got "the number you have dialled is not available from this service".

Called but left no message

Missed call don’t want call back after reading all the search here

No message left so probably spam scam

No message left, return call gets "number not available from this service". Scam for sure.

Rung last 3 days at nearly same time 3:00 UTC. Hangs up within 5 secs before I can answer call, so must be an auto dialer

Rung last 3 days at same time 3:00 UTC. Hangs up before I can answer

Called two days in a row, left no message, no text.

Hung up after answering. Surely a robocall that checks if phone numbers are active. Picking up and saying something will verify your number, then they record it on a list to use for scams, spams or spoofing.

answered call, said hello, male voice replied hello then hung up call

Caller: I do t know

Male voice called said my surname and then hung up . Service unavailable when I redialed

Rang my number twice in 24 hours .No message left so I will now block

Continually rings at the same time each day and hangs up.

Hung up immediately when answered

Called but phone blocked unknown caller, didn't leave a voice message.

I answered and said hello, a male voice said hello and then ended the call

Caller: 0415 880 115

Keep calling me, but as soon as I pick up, call disconnected.

Caller: Mark

Claimed to be a "Mark from an Energy Provider" despite sounding Indian and in a Call Centre. Spam!

But now they have your number (picked randomly), by answering, they know someone owns it, they are listening, looking for gullible victims. This is what they do. Beware...