Caller: Call centre

This call showed as coming from Perth WA. When I answered there were a few seconds of silence, followed by a few more seconds of background noise which sounded like a call centre, then the call was terminated from the other end. I had received a similar call the previous day from a similar number (differing only by the last digit). I suspect it was a scam call attempt and it looks like someone is using a batch of numbers from the same area to make their calls. It will be interesting to see if I get any more calls from the same group.