Robtex

Up: 58.96.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 58.96.21.0/25
Down right: 58.96.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.96.21.0	A+PTR	0.21.96.58.static.exetel.com.au
58.96.21.3	PTR	3.21.96.58.static.exetel.com.au
58.96.21.3	A	mail2.containaway.com.au
58.96.21.3	A	mail2.smartbox2u.com.au
58.96.21.51	PTR	51.21.96.58.static.exetel.com.au
58.96.21.51	A	mail.livingturf.com
58.96.21.61	PTR	61.21.96.58.static.exetel.com.au
58.96.21.91	PTR	91.21.96.58.static.exetel.com.au
58.96.21.91	A	charlie.sersol.com.au
58.96.21.91	A	www.sersol.com.au
58.96.21.92	PTR	92.21.96.58.static.exetel.com.au
58.96.21.92	A	stargate.citadelcomputer.com.au
58.96.21.92	A	dmz-firewall.infinetgroup.com.au
58.96.21.98	PTR	98.21.96.58.static.exetel.com.au
58.96.21.130	A+PTR	ranger.kgpl.com
58.96.21.130	A	www.sk.vg
58.96.21.130	A	ranger.kanji.com.au
58.96.21.131	A+PTR	secure.kgpl.com
58.96.21.131	A	exe.secure.kgpl.com
58.96.21.132	A+PTR	132.21.96.58.static.exetel.com.au
58.96.21.132	A	mail1.kgpl.com
58.96.21.135	A+PTR	135.21.96.58.static.exetel.com.au
58.96.21.135	A	mail2.kgpl.com
58.96.21.139	PTR	139.21.96.58.static.exetel.com.au
58.96.21.139	A	monierprime.com.au
58.96.21.139	A	yi.kanji.com
58.96.21.223	A+PTR	223.21.96.58.static.exetel.com.au
58.96.21.231	PTR	231.21.96.58.static.exetel.com.au
58.96.21.245	A	mail.munchexpress.com.au