Robtex

Up: 203.10.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.10.1.0/25
Down right: 203.10.1.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.10.1.2	A+PTR	cisco1.westnet.com.au
203.10.1.9	A+PTR	dnscache02.westnet.com.au
203.10.1.9	A	ns1.agn.net.au
203.10.1.10	A+PTR	backup.wn.com.au
203.10.1.14	PTR	tc3-ha.perth.westnet.com.au
203.10.1.17	A+PTR	bilby.wn.com.au
203.10.1.17	A	bilby.westnet.com.au
203.10.1.17	A	ns1.westnet.com.au
203.10.1.20	A	westnet.biz
203.10.1.24	A+PTR	secure1.wn.com.au
203.10.1.24	A	goanna.wn.com.au
203.10.1.24	A	web.westnet.com.au
203.10.1.25	A+PTR	secure.westnethosting.com.au
203.10.1.28	A	myaccount.westnet.com.au
203.10.1.29	PTR	tc1-ha.perth.westnet.com.au
203.10.1.32	A+PTR	elle.wn.com.au
203.10.1.40	A	wopilkara.wn.com.au
203.10.1.54	PTR	turtle.westnet.com.au
203.10.1.59	PTR	per-vpn.westnet.com.au
203.10.1.60	PTR	surfsite.com.au
203.10.1.66	PTR	www.astro.com.au
203.10.1.67	PTR	midwest.com.au
203.10.1.68	PTR	www.karriweb.net.au
203.10.1.70	A+PTR	webhosting.wn.com.au
203.10.1.70	A	mccashney.com
203.10.1.70	A	yamaji.com.au
203.10.1.71	A	dibbler.westnet.com.au
203.10.1.72	PTR	mediatvtech.com
203.10.1.73	PTR	lifelink.com.au
203.10.1.102	A+PTR	ninox.westnet.com.au
203.10.1.103	A	ninox1.westnet.com.au
203.10.1.104	A+PTR	ninox2.westnet.com.au
203.10.1.133	A	in-mta03.westnet.com.au
203.10.1.134	A	in-mta04.westnet.com.au
203.10.1.135	A	in-mta05.westnet.com.au
203.10.1.136	A	in-mta02.westnet.com.au
203.10.1.139	PTR	vscan05.westnet.com.au
203.10.1.140	A+PTR	in-mta01.westnet.com.au
203.10.1.143	PTR	relay.westnet.com.au
203.10.1.143	A	iinetrelay.cbo.net.au
203.10.1.143	A	relay.iinet.net.au
203.10.1.145	PTR	webmail.westnet.com.au
203.10.1.145	A	mail.dolphinswimmingpools.com
203.10.1.145	A	mail.xiaolawyers.com
203.10.1.146	PTR	mulgara.westnet.com.au
203.10.1.146	A	mail.hollcore.com
203.10.1.146	A	mail.busseltonbeach.com.au
203.10.1.147	A	mailr.westnet.com.au
203.10.1.149	PTR	relay-filter.westnet.com.au
203.10.1.149	A	mail.domanieyewear.com
203.10.1.149	A	longneck.westnet.com.au
203.10.1.150	A+PTR	mail-lb.westnet.com.au
203.10.1.151	A	lists.westnet.com.au
203.10.1.154	A	relay-filter-tls.westnet.com.au
203.10.1.200	A	antispam.westnet.com.au
203.10.1.238	A+PTR	inbound-mail03.westnet.com.au
203.10.1.244	A+PTR	outbound-mail03.westnet.com.au
203.10.1.246	A+PTR	relay-mail01.westnet.com.au
203.10.1.247	A+PTR	relay-mail02.westnet.com.au