Robtex

Up: 203.173.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.173.43.0/25
Down right: 203.173.43.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.173.43.1	PTR	203-173-43-1.perm.iinet.net.au
203.173.43.13	PTR	203-173-43-13.perm.iinet.net.au
203.173.43.15	A	mail.atfa.com.au
203.173.43.16	A+PTR	mail.bppc.org.au
203.173.43.35	A+PTR	203-173-43-35.perm.iinet.net.au
203.173.43.43	A+PTR	remote.stqld.com.au
203.173.43.49	PTR	mail.ausbook.com.au
203.173.43.49	A	mail.synrax.com
203.173.43.49	A	ns.synrax.com
203.173.43.51	PTR	203-173-43-51.perm.iinet.net.au
203.173.43.51	A	securisys.com.au
203.173.43.51	A	lazarusmedical.com.au
203.173.43.63	PTR	203-173-43-63.perm.iinet.net.au
203.173.43.63	A	mail.priority.net.au
203.173.43.63	A	mail.knight.net.au
203.173.43.65	A+PTR	203-173-43-65.perm.iinet.net.au
203.173.43.65	A	quantum-it.com.au
203.173.43.86	A	mail1.advance-merc.com.au
203.173.43.86	A	mail.advance-merc.com.au
203.173.43.98	A	blocker.beps.net.au
203.173.43.98	A	blocker.pislc.com
203.173.43.105	PTR	mail.firewall.elliottaustralia.com
203.173.43.105	A	ell-bne-fw1-2.elliottaustralia.com
203.173.43.106	A+PTR	203-173-43-106.perm.iinet.net.au
203.173.43.106	A	murrischool.qld.edu.au
203.173.43.106	A	cvre.com.au
203.173.43.108	A+PTR	mail.innisfailrsl.com.au
203.173.43.108	A	mail.innisfailrsl.com
203.173.43.131	A	remote.ginginfamilymedicalcentre.com.au
203.173.43.131	A	mail.ginginfamilymedicalcentre.com.au
203.173.43.134	A+PTR	203-173-43-134.perm.iinet.net.au
203.173.43.135	A+PTR	203-173-43-135.perm.iinet.net.au
203.173.43.135	A	mail.tamborinemountainmedical.com.au
203.173.43.135	A	remote.tamborinemountainmedical.com.au
203.173.43.141	A	hogsprofilemanagers.com
203.173.43.145	PTR	townsville.smithandelliott.com.au
203.173.43.145	A	mail.accoras.com
203.173.43.163	PTR	mail.hit.net.au
203.173.43.163	A	strikeserver.selfip.com
203.173.43.163	A	mail.hatfields.com.au
203.173.43.179	A	aylwardgame.com
203.173.43.180	A+PTR	203-173-43-180.perm.iinet.net.au
203.173.43.180	A	lasbookkeeping.com.au
203.173.43.204	PTR	203-173-43-204.perm.iinet.net.au
203.173.43.204	A	e-quip.com.au
203.173.43.204	A	mail.e-quip.com.au
203.173.43.206	PTR	remote.redwoodcapital.com.au
203.173.43.206	A	mail.hrltesting.com
203.173.43.210	A+PTR	mx1.sp.com.au
203.173.43.210	A	softwareprojects.net.au
203.173.43.210	A	ns5.sp.com.au
203.173.43.220	PTR	mail.evit.com.au
203.173.43.225	A+PTR	203-173-43-225.perm.iinet.net.au
203.173.43.226	A+PTR	203-173-43-226.perm.iinet.net.au
203.173.43.226	A	mail.cooperfozard.com.au
203.173.43.237	PTR	203-173-43-237.perm.iinet.net.au
203.173.43.237	A	jpj.com.au
203.173.43.237	A	agora.com.au
203.173.43.254	A+PTR	ipcop.zeejayhosting.com