Robtex

Up: 123.136.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.136.48.0/23
Down right: 123.136.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.136.48.0	A	0-48-136-123.ip.esc.net.au
123.136.48.4	PTR	4-48-136-123.ip.esc.net.au
123.136.48.7	A+PTR	7-48-136-123.ip.esc.net.au
123.136.48.7	A	ns.saosce.com
123.136.48.8	A	mx5.saosce.com.au
123.136.48.9	A	saosce.com.au
123.136.48.10	A+PTR	10-48-136-123.ip.esc.net.au
123.136.48.10	A	loucasseafoodrestaurant.com.au
123.136.48.12	PTR	12-48-136-123.ip.esc.net.au
123.136.48.12	A	woodwoolaustralia.com.au
123.136.48.12	A	cheeseco.com.au
123.136.48.40	A+PTR	mail.sarahgroup.com.au
123.136.48.43	A+PTR	43-48-136-123.ip.esc.net.au
123.136.48.62	A	gw2.ryk.bz
123.136.48.133	PTR	133-48-136-123.ip.esc.net.au
123.136.48.143	A	ns.saosce.com
123.136.49.0	A+PTR	0-49-136-123.ip.esc.net.au
123.136.49.11	A	roofdoctors.com.au
123.136.49.11	A	bringingbetterbusiness.com.au
123.136.50.0	A	0-50-136-123.ip.esc.net.au
123.136.50.13	A+PTR	13-50-136-123.ip.esc.net.au
123.136.50.13	A	mail.techinsa.com.au
123.136.50.39	A	mail.archerx.com.au
123.136.50.75	A+PTR	75-50-136-123.ip.esc.net.au
123.136.50.77	A+PTR	77-50-136-123.ip.esc.net.au
123.136.50.141	A+PTR	141-50-136-123.ip.esc.net.au
123.136.50.141	A	www.printgraphicsdisplays.com.au
123.136.50.141	A	www.adyo.com.au
123.136.50.161	A+PTR	161-50-136-123.ip.esc.net.au
123.136.50.161	A	mail.vitaldata.net
123.136.50.181	A+PTR	181-50-136-123.ip.esc.net.au
123.136.50.181	A	carclew.org.au
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