Robtex

Up: 203.58.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.58.0.0/23
Down right: 203.58.2.0/23

IP	Type	Hostname
203.58.0.0	PTR	203-58-0-000.static.tpgi.com.au
203.58.0.2	PTR	203-58-0-002.static.tpgi.com.au
203.58.0.34	A	mail.maple-brownabbott.com
203.58.0.34	A	mail.maple-brownabbott.com.au
203.58.0.34	A	mail2.maple-brownabbott.com
203.58.0.75	PTR	ironport.catholicmission.org.au
203.58.0.75	A	mx1.catholicmission.org.au
203.58.0.114	PTR	203-58-0-114.static.tpgi.com.au
203.58.0.122	PTR	mail.mozi.com.au
203.58.0.122	A	mx1.mozi.com.au
203.58.0.122	A	mail.bestandless.net.au
203.58.0.132	PTR	smtp.oriel.com.au
203.58.0.155	A+PTR	203-58-0-155.static.tpgi.com.au
203.58.0.155	A	pacificbmg.com.au
203.58.0.170	PTR	203-58-0-170.static.tpgi.com.au
203.58.0.170	A	ns3.rhomberg.com
203.58.0.211	A	mail.willoughbyleisure.com.au
203.58.0.220	A	victoriawalk.com.au
203.58.1.2	A	203-58-1-2.static.tpgi.com.au
203.58.1.34	A	mail.macanz.com
203.58.1.98	A+PTR	203-58-1-98.static.tpgi.com.au
203.58.1.130	A+PTR	203-58-1-130.static.tpgi.com.au
203.58.1.163	PTR	203-58-1-163.static.tpgi.com.au
203.58.1.163	A	blogs.ludus.me
203.58.1.163	A	mail.ludus.me
203.58.1.198	A+PTR	203-58-1-198.static.tpgi.com.au
203.58.1.226	PTR	mail.ridbc.org.au
203.58.1.226	PTR	webmail.ridbc.org.au
203.58.3.3	PTR	203-58-3-3.tpgi.com.au
203.58.3.3	A	champmbo.com
203.58.3.26	PTR	203-58-3-26.tpgi.com.au
203.58.3.68	PTR	tccappsrv03.campaign.net.au
203.58.3.68	A	mail.mid-tech.net
203.58.3.102	A	gateway.dmsmaritime.com
203.58.3.104	A+PTR	203-58-3-104.tpgi.com.au
203.58.3.109	A	essencemedia.com.au
203.58.3.115	A+PTR	203-58-3-115.tpgi.com.au
203.58.3.134	A+PTR	203-58-3-134.tpgi.com.au
203.58.3.137	PTR	203-58-3-137.tpgi.com.au
203.58.3.137	A	mail.dmsmaritime.com
203.58.3.139	A	acvamps.dmsmaritime.com
203.58.3.141	A	203-58-3-141.tpgi.com.au
203.58.3.154	A+PTR	203-58-3-154.tpgi.com.au
203.58.3.192	PTR	203-58-3-192.tpgi.com.au
203.58.3.226	PTR	mail.songzu.com
203.58.3.245	A+PTR	203-58-3-245.tpgi.com.au
203.58.3.252	A	203-58-3-252.tpgi.com.au