Rang me, unknown number so let it go through to voicemail.

No voicemail left.

Typical spammer pattern, but will wait and see.

didn't leave a message - probs spam - call back and number is not in service

Interstate caller. No message. Scammer.

Scam caller?

Phishing scam from a spoofed number that is not connected. An online search shows the number was registered to a now bankrupt Company NZ 3 Pty Ltd so caller obviously trolls for old numbers to fool unsuspecting targets. Don't answer & Block!

Caller: Probably from SCAMERS

Probably Robocalls from SCAMERS
Silent call, they hang up once you answer the call.
Block it.

Caller: Don't know

There was an Indian lady spoke on the phone and ask if this is Source Engineering, I answered no and she just hung up on me

Called 4 times in 2 days. Ignored the first 3. Answered the last one by mistake. It was silent for 2-3 seconds then hung up. Some sort of robocall I reckon, checking what numbers are active, so they can do targeted spam later.

They hung up.

Not sure who called me. Rang but no message.

Let it go to voicemail, left no message, my voicemail says leave a message or you will be assumed to be a spammer and blocked. Guess what; they are now blocked.