Robtex

Up: 203.58.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.58.18.0/24
Down right: 203.58.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.58.18.1	A	wag-gw.tpgi.com.au
203.58.18.12	PTR	203-58-18-012.static.tpgi.com.au
203.58.18.58	A+PTR	mail.rgis.com.au
203.58.18.58	A	www.rgis.com.au
203.58.18.58	A	rgis.co.nz
203.58.18.90	PTR	203-58-18-090.static.tpgi.com.au
203.58.18.105	A+PTR	203-58-18-105.static.tpgi.com.au
203.58.18.106	A+PTR	203-58-18-106.static.tpgi.com.au
203.58.18.107	A+PTR	203-58-18-107.static.tpgi.com.au
203.58.18.136	A	203-58-18-136.static.tpgi.com.au
203.58.18.147	A+PTR	203-58-18-147.static.tpgi.com.au
203.58.18.153	A+PTR	203-58-18-153.static.tpgi.com.au
203.58.18.182	A+PTR	203-58-18-182.static.tpgi.com.au
203.58.18.186	A+PTR	203-58-18-186.static.tpgi.com.au
203.58.18.188	PTR	203-58-18-188.static.tpgi.com.au
203.58.18.188	A	lkp2.racingvictoria.com
203.58.18.196	A	203-58-18-196.static.tpgi.com.au
203.58.18.203	A	src.racingvictoria.net.au
203.58.18.208	A	www1.racingvictoria.net.au
203.58.18.227	PTR	mail.racingvictoria.net.au
203.58.18.232	A+PTR	bareed.racingvictoria.net.au
203.58.18.232	A	mail02.racing.com
203.58.18.232	A	mail2.winningpost.com.au
203.58.18.243	A+PTR	203-58-18-243.static.tpgi.com.au
203.58.19.18	A+PTR	203-58-19-18.static.tpgi.com.au
203.58.19.26	A+PTR	203-58-19-26.static.tpgi.com.au
203.58.19.51	PTR	mail.thesmartgroup.com.au
203.58.19.52	PTR	external.thesmartgroup.com.au
203.58.19.52	A	mitel.smartoption.com.au
203.58.19.52	A	mx.smartoption.com.au
203.58.19.60	A+PTR	australiasmtp.haygroup.com
203.58.19.61	A	australia2smtp.haygroup.com
203.58.19.79	A+PTR	203-58-19-79.static.tpgi.com.au
203.58.19.90	A+PTR	203-58-19-90.static.tpgi.com.au
203.58.19.91	A+PTR	203-58-19-91.static.tpgi.com.au
203.58.19.92	A+PTR	203-58-19-92.static.tpgi.com.au
203.58.19.94	PTR	smtp.yavneh.vic.edu.au
203.58.19.121	A	203-58-19-121.static.tpgi.com.au
203.58.19.140	A+PTR	203-58-19-140.static.tpgi.com.au
203.58.19.157	PTR	203-58-19-157.static.tpgi.com.au
203.58.19.168	A+PTR	203-58-19-168.static.tpgi.com.au
203.58.19.170	PTR	203-58-19-170.static.tpgi.com.au
203.58.19.170	A	giantbikes.com.au
203.58.19.190	A	203-58-19-190.static.tpgi.com.au
203.58.19.209	PTR	203-58-19-209.static.tpgi.com.au
203.58.19.215	A+PTR	203-58-19-215.static.tpgi.com.au