Rang twice and hung up before I could answer no message left

they rang & when I answered without saying a word. They hung up within seconds. It seems any scam callers hang up straight away if you don't say anything. Very few will talk they just hand up quick.

Caller: Solar panels company ?

No message left on previous occasions several calls received
'

A male, introducing himself as Micheal, wanting to speak to the owner of the house. “Sorry mate” I said “He’s not in” Definitely a scam.

Short call and no message left. Probably scam.

Caller: Some Butthole

Some butthole called. Left no message.
I assume that as this is not a number registered to a legitimate business, it's probably some shonky mob leeching off government rebates to create something that is meant to resemble a legitimate business.