I called back number 0421 901 756 reached voice mail but did not say for what company.

Spoofed caller ID from overseas (they made the mistake of spoofing the "00" at the beginning, required to call and international number in some countries like the US - ie the number shows as "00421901756" on caller ID. If it was a real call from that number, it would have shown as 0421 901 756 or just as 0421 901 756

Do not answer. Anyone spoofing caller ID does not have good intentions!

Called and when I answered they hung up...

I have blocked this number previously but it still comes through to my voicemail. When I check the voicemail message I can hear someone breathing but they don't leave a message and you can't call them back

Caller: Summit Advisory Group

Cold call from marketer of financial services. I told him he had no business calling me as my number is on the do not call list, and hung up.

I answered the call, but hung up immediately.

Phoned through with suspicious number from Newcastle area. I did not answer. Caller went to voicemail and left a 3 second blank message.

Don’t answer this number it’s a scam.

They call to charge us for the call it was in the news lately.

Called me today and I did not answer. No Voicemail left.

Caller: ‭0421 901 756‬

Received a call too. Didn’t leave a voice message. Didn’t bother calling back

Called me 6 times in 3 weeks. No message left. Now blocked.

Caller: 0421 901 756

keeps call even though I've blocked the number. ???

‭0421 901 756‬

This number has called me 4 times this week. Goes to my voicemail but never leave a message

Answer the call but was quite on the other end.

I also called back from a landline and reached voicemail. Received calls from this number 4 times in a week. Trucaller reported it as potential fraud.

Caller: 0421 901 756

Call and reached my voicemail but did not leave any message!
If they don’t bother to leave a message don’t bother about them.

Called 5 times in 2 weeks. No message left