This number called me twice today and once yesterday, I had the phone on silent as I had done night shift. No message was left. I didn't bother to call back as I read all of the above comments and figured it was something dodgy.

I got a call from this number first, first no one there, then when called back it was apparently someone from Telstra calling about Foxtel and asked me for my name and DOB.  I asked about a password as usually they would do that, he didn't state my name, only asked for mine and he said cause of their new system no password so just hung up on him, not willing to provide any details.  I see on here now there's a bit of funny business from this #, my suspicions were probably right has nothing to do with Telstra or Foxtel.

Of course they have access to Optus' data.  Optus rent almost all their infrastructure and network access from Telstra.

I had just bought something from Rick Hart, and I got a call from this number today. Did we all buy something from Rick Hart's?

Lodge your complaint herehttps://www.donotcall.gov.au/complaint1.cfm

Yes, it it Telstra.  A Telstra call centre.  I have been advised that they use an autodialer, which calls about 8 numbers at a time, even though they only have a few operators.  They do this on the pretense that half the numbers will not answer, ring out, be engaged etc...

Telstra was recently fined over $100,000 for calling numbers that are listed on the Do Not Call Register.  Hopefully they'll get the hint.