Robtex

Up: 123.136.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.136.51.0/25
Down right: 123.136.51.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.136.51.0	A	0-51-136-123.ip.esc.net.au
123.136.51.11	A	mail.slotmasters.org
123.136.51.11	A	ns.slotmasters.org
123.136.51.150	A	blackdiamondauto.com.au
123.136.51.150	A	cityparts.com.au
123.136.51.150	A	hostguard.com
123.136.51.172	A	fitzsimons.com.au