Robtex

Up: 123.51.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.51.40.0/22
Down right: 123.51.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.51.42.80	PTR	123-51-42-80.static.dsl.net.au
123.51.44.13	A	mail.kitco.net.au
123.51.44.18	PTR	123-51-44-18.static.dsl.net.au
123.51.44.18	A	mediscreen.com.au
123.51.44.120	PTR	123-51-44-120.static.dsl.net.au
123.51.44.160	PTR	123-51-44-160.static.dsl.net.au
123.51.44.243	PTR	123-51-44-243.static.dsl.net.au
123.51.45.33	PTR	123-51-45-33.static.dsl.net.au
123.51.45.163	PTR	123-51-45-163.static.dsl.net.au
123.51.46.9	PTR	123-51-46-9.static.dsl.net.au
123.51.46.9	A	mail.terraculture.com.au
123.51.46.192	PTR	123-51-46-192.static.dsl.net.au
123.51.46.233	A	mail.riskpro.com.au
123.51.47.186	PTR	123-51-47-186.static.dsl.net.au
123.51.47.186	A	copypaperking.com.au
123.51.47.186	A	fentonbus.com.au