BigPond Broadband DNS & Login Server IP Addresses

Optus Cable DNS IP Addresses and Suffixes

IP Address Ranges for Broadband

BigPond Broadband DNS & Login Server IP Addresses

	Login Servers (Cable)	DNS Server IP Addresses	DNS Suffixes
Queensland	61.9.208.13	61.9.211.33 61.9.211.1	qld.bigpond.net.au
New South Wales	61.9.192.13	61.9.194.49 61.9.195.193	nsw.bigpond.net.au
ACT		61.9.207.1 61.9.195.193	nsw.bigpond.net.au
Victoria	61.9.128.13	61.9.133.193 61.9.134.49	vic.bigpond.net.au
South Australia/NT	61.9.224.13	61.9.226.33 61.9.194.49	vic.bigpond.net.au
Western Australia	61.9.240.13	61.9.242.33 61.9.194.49	vic.bigpond.net.au
Tasmania		61.9.188.33 61.9.134.49	vic.bigpond.net.au

See also this page at Telstra for current DNS addresses and this page for current DNS Suffix search orders.

Optus Cable DNS IP Addresses and Suffixes

	DNS Server IP Addresses	DNS Suffixes
Queensland	203.2.75.132	qld.optushome.com.au
	198.142.0.51
New South Wales	203.2.75.132	nsw.optushome.com.au
	198.142.0.51
Victoria	198.142.0.51	vic.optushome.com.au
	203.2.75.132

The DNS IPs resolve from dns.meb.optusnet.com.au (198.142.0.51) and dns.syd.optusnet.com.au (203.2.75.132).
There's also these which a Sydney Optus user advised me about -

ns1.optusnet.com.au - 203.2.75.2
ns2.optusnet.com.au - 203.2.75.12

IP Address Ranges for Broadband

Unfortunately I've had to scrap the IP range reporting as the info I had was well out of date and they seem to be all over the place now.
For IP Address lookups in general see the GeoBytes IP Address locator.
See also NeoTrace. A useful tool for tracking the source of IP addresses.