I noticed I have missed a call from this number. I then called back on the number but no one answered and I then hung up. about a minute after I called again and male person answered. I said to the person that I have missed a call from this number. He said "I didn't call you"; I then said "I have your number on my phone under 'missed calls' list". He then said 'it may be a mistake'. Then I hung up.
About an hour after I have missed a call from another strange number and it was 0425 039 789. I did not call back on this number. Someone must have being trying on something.