Robtex

Up: 203.12.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.12.28.0/23
Down right: 203.12.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.12.28.1	A+PTR	portmac.midcoast.com.au
203.12.28.3	A+PTR	portmac1.midcoast.com.au
203.12.28.3	A	sparc.midcoast.com.au
203.12.28.4	PTR	router.midcoast.com.au.28.12.203.in-addr.arpa
203.12.28.4	A	mx3.midcoast.com.au
203.12.28.6	PTR	portmac.midcoast.com.au
203.12.28.9	A	krouter.midcoast.com.au
203.12.28.16	A	mnci-mx2.midcoast.com.au
203.12.28.18	PTR	mcport122838.midcoast.com.au
203.12.28.18	A	asgaard.ecopost.com.au
203.12.28.18	A	vmx1.felglow.com.au
203.12.28.34	PTR	lamp-04-02.midcoast.com.au
203.12.28.34	A	www.midcoastwindows.com.au
203.12.28.34	A	lamp-04-01.midcoast.com.au
203.12.28.36	A	flynnsbeachresort.com.au
203.12.28.36	A	legs.com.au
203.12.28.36	A	betterboats.com.au
203.12.28.39	PTR	mx04-01.midcoast.com.au
203.12.28.39	A	mx1.midcoast.com.au
203.12.28.40	A+PTR	mx04-02.midcoast.com.au
203.12.28.41	A	mcportsh1.midcoast.com.au
203.12.28.42	A	mcportsh2.midcoast.com.au
203.12.28.43	A	mcportsh3.midcoast.com.au
203.12.28.45	A	mcportsh5.midcoast.com.au
203.12.28.46	A	mcportsh6.midcoast.com.au
203.12.28.47	A	mcportsh7.midcoast.com.au
203.12.28.48	A	mcportsh8.midcoast.com.au
203.12.28.120	A+PTR	mcport28-120.midcoast.com.au
203.12.28.157	A	www.ecopost.com.au
203.12.28.167	PTR	mcport28-167.midcoast.com.au
203.12.28.167	A	eyecareplus.biz
203.12.28.167	A	eyecareplus.info
203.12.29.16	A	midcoast01202916.midcoast.com.au
203.12.29.17	A+PTR	midcoast01202917.midcoast.com.au
203.12.29.19	A+PTR	midcoast01202919.midcoast.com.au
203.12.29.58	A+PTR	midcoast01202958.midcoast.com.au
203.12.29.60	A+PTR	midcoast01202960.midcoast.com.au
203.12.29.77	A+PTR	midcoast01202977.midcoast.com.au
203.12.29.93	A+PTR	midcoast01202993.midcoast.com.au
203.12.29.97	A+PTR	midcoast01202997.midcoast.com.au
203.12.29.103	A+PTR	midcoast012029103.midcoast.com.au
203.12.29.106	A+PTR	midcoast012029106.midcoast.com.au
203.12.29.111	A	midcoast012029111.midcoast.com.au
203.12.29.114	A	midcoast012029114.midcoast.com.au
203.12.29.116	A	midcoast012029116.midcoast.com.au
203.12.29.124	A+PTR	midcoast012029124.midcoast.com.au
203.12.29.145	A	midcoast012029145.midcoast.com.au
203.12.29.149	A+PTR	midcoast012029149.midcoast.com.au
203.12.29.156	A+PTR	midcoast012029156.midcoast.com.au
203.12.29.175	A	midcoast012029175.midcoast.com.au
203.12.29.176	A+PTR	midcoast012029176.midcoast.com.au
203.12.29.177	A	midcoast012029177.midcoast.com.au
203.12.29.186	A	midcoast012029186.midcoast.com.au
203.12.29.187	A	midcoast012029187.midcoast.com.au
203.12.29.211	A+PTR	midcoast012029211.midcoast.com.au
203.12.29.219	A	midcoast012029219.midcoast.com.au
203.12.29.229	A+PTR	midcoast012029229.midcoast.com.au
203.12.29.230	A	midcoast012029230.midcoast.com.au
203.12.29.236	A	midcoast012029236.midcoast.com.au
203.12.30.226	A+PTR	erl.vic.gov.au
203.12.30.226	A	erlmail.erl.vic.gov.au
203.12.31.69	A	mx01.zoltak.com
203.12.31.70	A	jbtlaw.com.au
203.12.31.77	PTR	test.keytrust.com.au
203.12.31.135	A+PTR	proxy11.keytrust.com.au
203.12.31.135	A	woundcam.com
203.12.31.136	A+PTR	proxy10.keytrust.com.au
203.12.31.136	A	woundcam.com.au
203.12.31.143	PTR	proxy1.keytrust.com.au
203.12.31.143	A	remotesupport.keytrust.com.au
203.12.31.143	A	ac.keytrust.com.au
203.12.31.144	A+PTR	collabcare.com
203.12.31.144	A	proxy9.keytrust.com.au
203.12.31.145	A+PTR	proxy2.keytrust.com.au
203.12.31.145	A	teleconnect.us
203.12.31.147	PTR	www2.keytrust.com.au
203.12.31.150	A+PTR	proxy3.keytrust.com.au
203.12.31.150	A	mail2.keytrust.com.au
203.12.31.151	A	ibirs.keytrust.com.au
203.12.31.152	A+PTR	vportal.keytrust.com.au
203.12.31.152	A	metlife.shn.org.au
203.12.31.152	A	shn.org.au
203.12.31.154	PTR	proxy6.keytrust.com.au
203.12.31.154	A	ac.tcs.net.au
203.12.31.159	PTR	metlife.shn.org.au
203.12.31.185	A	nmsack.keytrust.com.au
203.12.31.190	A	zedmedexchange.com.au
203.12.31.195	A+PTR	smg1.keytrust.com.au
203.12.31.200	A	ac.keytrust.com.au
203.12.31.202	A	ac.tcs.net.au
203.12.31.209	A+PTR	ns2.keytrust.com.au
203.12.31.210	A+PTR	ns1.keytrust.com.au
203.12.31.211	A+PTR	ns3.keytrust.com.au
203.12.31.211	A	ns1-1.keytrust.com.au
203.12.31.218	PTR	optus.performancecentre.com
203.12.31.222	A	amr.keytrust.com.au
203.12.31.222	A	voltage-pp-0000.keytrust.com.au
203.12.31.229	A	mailguard-test.keytrust.com.au
203.12.31.229	A	mail2.shn.org.au
203.12.31.230	A	anywherehealth.net
203.12.31.231	PTR	tmx.keytrust.com.au
203.12.31.231	A	mail.shn.org.au
203.12.31.232	A+PTR	tmx2.keytrust.com.au
203.12.31.232	A	mx2.wellnow.care
203.12.31.236	A+PTR	tmx1.keytrust.com.au
203.12.31.236	A	mail2.tcs.net.au
203.12.31.236	A	mail.keytrust.com.au
203.12.31.238	PTR	ccn1.keytrust.com.au