Robtex

Up: 203.17.36.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.17.36.0/25
Down right: 203.17.36.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.17.36.4	PTR	snoop.cia.com.au
203.17.36.4	A	ns2.cyberhostnet.com
203.17.36.4	A	ns2.selfservicehosting.com
203.17.36.7	PTR	filter.mail.com.au
203.17.36.8	PTR	mx1.webcity.com.au
203.17.36.8	A	mx1.host1.com.au
203.17.36.8	A	mx1.enetica.com.au
203.17.36.15	A+PTR	mailout.enetica.com.au
203.17.36.15	A	mrhanky.mail.com.au
203.17.36.17	PTR	mail.cia.com.au
203.17.36.17	A	mail.resistance.org.au
203.17.36.17	A	mail.enetica.com.au
203.17.36.19	PTR	www.cia.net.au
203.17.36.19	A	*.sulis.webcity.com.au
203.17.36.19	A	ns4.webcity.com.au
203.17.36.33	PTR	spook.cia.com.au
203.17.36.33	A	menzies.webcity.com.au
203.17.36.33	A	*.kidsreciting.net
203.17.36.40	PTR	mail.webcityaustralia.com
203.17.36.40	A	mail.thecosypet.com
203.17.36.40	A	mail.airtrader.com.au
203.17.36.47	A+PTR	mailmx.ar.com.au
203.17.36.47	A	mail.ar.com.au
203.17.36.47	A	pop.ar.com.au
203.17.36.111	PTR	server-33-r77.ipv4.syd02.ds.network
203.17.36.111	A	www.josharp.com.au
203.17.36.111	A	hilloceansky.com.au
203.17.36.128	A	spamfilter.cia.com.au
203.17.36.150	PTR	kenny.webcity.com.au
203.17.36.150	A	basic.webcity.com.au
203.17.36.150	A	peterderyk.com
203.17.36.213	A+PTR	vweb1.ar.com.au
203.17.36.217	PTR	ge-14-0-0-0.wc-r1.syd1.bucan.com.au
203.17.36.236	A	mail2.crestrock.com.au