I'm surprised no one else has mentioned this yet, but Telstra is hijacking a lot of prefixes:

https://rpki.cloudflare.com/?view=bgp&prefix=&asn=1221&validState=Invalid 

Since we don't have RPKI filtering in our network (yet), we are currently filtering everything with the path ".* 4637 1221$". 

This is of course taking a while...