I called back number (07) 4331 7576 rang once then gets disconnected automatically.

Caller: Green homegrow solar

marketing crap

says it is a bundaberg number - phones multiple times, leaves no message, line aways busy.

Blocked

Didn't answer, checked here, sounds like a scam to detect real numbers

Caller: Some Solar Company

I missed 4 calls from NSW numbers, and then final I answered this QLD number, and sure enough, telemarketers trying to flog solar panels...

Caller: Debt collection

Agency

Didn't pickup - sounds dodgy

Outbound call centre, doesn't accept incoming calls nor do they leave a voicemail message.

Probably a dodgy debt collector claiming they contacted you but then dont leave messages nor have a valid phone number

Line busy when calling back.

Line busy message

I was called by this number and missed it. I called back it rang once then disconected.

back number (07) 4331 7576 rang once then gets disconnected

called back number rang once then gets disconnected