Caller: scam call centre

this number has been used to call people, to see if anyone answers, If they do, it's logged as a Live number
Scam centres call the live numbers via a different number, so they don't look related.
Block these testing numbers

earlier in the day I received a call from (03) 5642 7010, neither left a message on my answering machine. I can only assume this is also a spam call.

Pest caller. Leaves no message but calls all hours. When I return call, call fails.