The this number calls you on your mobile when you answer it no one is there and disconnects, when you try to call it back you get told that "this number has been disconnected" - I looked it up at google and it is registered to an address at 71-73 cooberrie st Cornubia Queensland a white house of the end of a street.
Do not know why they are calling, but my sisters computer was hacked by a group of internet hackers from Melbourne, and it may be them accessing numbers from her computer and email. They are Indian, they call you after they get your number posing as microsoft and ask for your password details etc and talk security threat to your computer. The are crooks, so I do not know if it is them or not but I would say be ware and block their number.