Robtex

Up: 58.6.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 58.6.18.0/24
Down right: 58.6.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.6.18.1	A	mail.brightonbeachphysio.com.au
58.6.18.7	PTR	local.parthonsoftware.com
58.6.18.7	A	remote.carpetsbydesign.net.au
58.6.18.24	A	mail.challengepaving.com.au
58.6.18.38	A	stirlingses.org.au
58.6.18.52	PTR	mail.interite.com.au
58.6.18.52	A	mail.inbuiltaustralia.com
58.6.18.52	A	mail.peakeprojects.com
58.6.18.72	A	azandbec.com
58.6.18.72	A	mail.aznbec.com
58.6.18.72	A	aznbec.com
58.6.18.121	A+PTR	mail.turkishbakeries.com
58.6.18.121	A	mail.labyrinthfootwear.com
58.6.18.163	PTR	dsl-58-6-18-163.wa.westnet.com.au
58.6.18.168	A+PTR	dsl-58-6-18-168.wa.westnet.com.au
58.6.18.168	A	mail.ojg.com.au
58.6.18.174	PTR	dsl-58-6-18-174.wa.westnet.com.au
58.6.18.174	A	mail.stumacsu.stumacsu.com
58.6.18.174	A	chalencreations.com.au
58.6.18.180	PTR	dsl-58-6-18-180.wa.westnet.com.au
58.6.18.180	A	mail.prolineproducts.com.au
58.6.18.180	A	mail2.greatlivinghomes.com.au
58.6.18.215	A+PTR	mail.truckworldrentals.com.au
58.6.18.217	A	dsl-58-6-18-217.wa.westnet.com.au
58.6.19.4	PTR	dsl-58-6-19-4.wa.westnet.com.au
58.6.19.4	A	mail.intastac.com
58.6.19.11	PTR	dsl-58-6-19-11.wa.westnet.com.au
58.6.19.11	A	mail.ept.com.au
58.6.19.11	A	mail.elecpowertech.com.au
58.6.19.17	A+PTR	dsl-58-6-19-17.wa.westnet.com.au
58.6.19.19	A+PTR	dsl-58-6-19-19.wa.westnet.com.au
58.6.19.22	A+PTR	dsl-58-6-19-22.wa.westnet.com.au
58.6.19.22	A	mail.platinumpd.com
58.6.19.24	PTR	mail.fernbrookfresh.com.au
58.6.19.24	A	fernbrookfresh.com.au
58.6.19.27	A	mail.hegneymandurah.com.au
58.6.19.30	A+PTR	dsl-58-6-19-30.wa.westnet.com.au
58.6.19.34	PTR	dsl-58-6-19-34.wa.westnet.com.au
58.6.19.34	A	owa.khakiwest.com.au
58.6.19.39	A+PTR	dsl-58-6-19-39.wa.westnet.com.au
58.6.19.45	A+PTR	dsl-58-6-19-45.wa.westnet.com.au
58.6.19.46	A+PTR	dsl-58-6-19-46.wa.westnet.com.au
58.6.19.52	A+PTR	dsl-58-6-19-52.wa.westnet.com.au
58.6.19.52	A	mail.austmed.com
58.6.19.54	A+PTR	dsl-58-6-19-54.wa.westnet.com.au
58.6.19.65	A+PTR	dsl-58-6-19-65.wa.westnet.com.au
58.6.19.68	A+PTR	dsl-58-6-19-68.wa.westnet.com.au
58.6.19.74	A+PTR	dsl-58-6-19-74.wa.westnet.com.au
58.6.19.79	A+PTR	dsl-58-6-19-79.wa.westnet.com.au
58.6.19.80	A	mail.rehabwa.com.au
58.6.19.81	A+PTR	dsl-58-6-19-81.wa.westnet.com.au
58.6.19.83	A+PTR	dsl-58-6-19-83.wa.westnet.com.au
58.6.19.84	A+PTR	dsl-58-6-19-84.wa.westnet.com.au
58.6.19.89	A+PTR	dsl-58-6-19-89.wa.westnet.com.au
58.6.19.92	A+PTR	dsl-58-6-19-92.wa.westnet.com.au
58.6.19.96	A+PTR	dsl-58-6-19-96.wa.westnet.com.au
58.6.19.99	A+PTR	dsl-58-6-19-99.wa.westnet.com.au
58.6.19.100	A+PTR	dsl-58-6-19-100.wa.westnet.com.au
58.6.19.101	PTR	mail.ticonderogapublications.com
58.6.19.105	A+PTR	dsl-58-6-19-105.wa.westnet.com.au
58.6.19.106	A+PTR	dsl-58-6-19-106.wa.westnet.com.au
58.6.19.112	A+PTR	dsl-58-6-19-112.wa.westnet.com.au
58.6.19.122	A	mail.computerlocks.net
58.6.19.128	A+PTR	dsl-58-6-19-128.wa.westnet.com.au
58.6.19.129	A+PTR	dsl-58-6-19-129.wa.westnet.com.au
58.6.19.131	A+PTR	dsl-58-6-19-131.wa.westnet.com.au
58.6.19.136	A+PTR	dsl-58-6-19-136.wa.westnet.com.au
58.6.19.142	A+PTR	dsl-58-6-19-142.wa.westnet.com.au
58.6.19.147	A+PTR	dsl-58-6-19-147.wa.westnet.com.au
58.6.19.151	A+PTR	dsl-58-6-19-151.wa.westnet.com.au
58.6.19.158	A+PTR	dsl-58-6-19-158.wa.westnet.com.au
58.6.19.159	A+PTR	dsl-58-6-19-159.wa.westnet.com.au
58.6.19.160	A+PTR	dsl-58-6-19-160.wa.westnet.com.au
58.6.19.161	A+PTR	dsl-58-6-19-161.wa.westnet.com.au
58.6.19.163	A+PTR	dsl-58-6-19-163.wa.westnet.com.au
58.6.19.165	A+PTR	dsl-58-6-19-165.wa.westnet.com.au
58.6.19.169	A+PTR	dsl-58-6-19-169.wa.westnet.com.au
58.6.19.172	A+PTR	dsl-58-6-19-172.wa.westnet.com.au
58.6.19.175	A+PTR	dsl-58-6-19-175.wa.westnet.com.au
58.6.19.181	A+PTR	dsl-58-6-19-181.wa.westnet.com.au
58.6.19.195	A+PTR	dsl-58-6-19-195.wa.westnet.com.au
58.6.19.199	A+PTR	dsl-58-6-19-199.wa.westnet.com.au
58.6.19.202	PTR	dsl-58-6-19-202.wa.westnet.com.au
58.6.19.202	A	alfa.net.au
58.6.19.206	A	mail.rawlinsonswa.com.au
58.6.19.206	A	mail.rawlhouse.com
58.6.19.214	A+PTR	dsl-58-6-19-214.wa.westnet.com.au
58.6.19.228	A+PTR	dsl-58-6-19-228.wa.westnet.com.au
58.6.19.230	A+PTR	dsl-58-6-19-230.wa.westnet.com.au
58.6.19.237	A+PTR	dsl-58-6-19-237.wa.westnet.com.au
58.6.19.249	A+PTR	dsl-58-6-19-249.wa.westnet.com.au