Had a few calls from them. Same story, can't call back

yeh f***!! they just tried to call me and then i pick up they hang up!!! little black hairy sweaty moles and rodents they are!!! rat off!!

Same here, f***ers call me like everyday and then hang up, wtf?

whose number is this

Called tonight, someone talking saying "hello and laughing" I hung up when they went silent.  Have had numerous calls from this number.

I've had several calls from this number this week.  I guess that it is a call centre using an automatic dialer.  It calls half a dozen or more numbers at the same time, and the telemarketer speaks to the one that answers first.  Means they can get more contacts in a less amount of time!  Bloody annoying but not much one can do about it

I have received at least six calls on my mobile from (07) 5634 9400. The call may have been to my landline which I have diverted to my mobile. They nearly always hang up immediately.
Interestingly, they are all on a Thursday.
Thu 3/9/09 14:45, Duration 2 seconds
Thu 10/9/09 16:11, Missed
Thu 17/9/09 13:54, Duration 3 seconds
Thu 1/10/09 15:36, Missed
Thu 8/10/09 12:46, Duration 4 seconds
Thu 8/10/09 19:06, Missed

I have no idea who is doing this.