I have the same thing happening as above, starting to become annoying, this is day three! And 4th call. And as above, won't answer/rings out when returning the call. 03 is normally a Victorian based area code. How do you block a number like this? Who is the carrier?

I keep geeting phone calls from this numner and when I  answer they hang up

was called from Dodo and told my first name. was told I had ordered a phone and internet package online. first I knew about any of this. then the caller hung up

called but hang up and I tried to call back twice no answer

Just had a call at home tonight and they hung up without leaving a message - I did *10# and found out the number was (03) 9001 5100.  I tried to phone back twice but after ringing just got an engaged sound.

1/2/2011: Well ... Dodo customer service confirms that (03) 9001 5100 is their online application office number and that they do have my details in their system - but I never sent these to Dodo - I have never had anything to do with Dodo - they keep transferring us to other service customers - Dodo confirms they made the call to me but as response to an online applicaitn - they are promising to find out how the source email address of whomever started this - last thing I want is to be stalked or billed for things I know nothing about! - they promise to get a manager to get back to me tomorrow