Find IP range of any ISP with APNIC

1. Go here http://wq.apnic.net/apnic-bin/whois.pl
2. Look up one of the IPs you know of in the range
3. Look for: mnt-lower
4. Change the Inverse attributes to mnt-lower
5. Then do a look up for: MAINT-AU-TIAR-AP (example)
6. Now click search and all the ranges will come up.