Robtex

Up: 203.21.160.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.21.176.0/21
Down right: 203.21.184.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.21.176.80	A	ob.pacificnational.com.au
203.21.178.16	PTR	pacnat.com.au
203.21.178.16	PTR	asciano.net.au
203.21.178.16	PTR	ftp.freightweb.com.au
203.21.180.8	A	mail.gslb.asciano.com.au
203.21.180.131	A	mail.gslb.asciano.com.au
203.21.182.36	A	ns4.pacnat.com.au
203.21.183.36	A	ns3.pacnat.com.au
203.21.183.97	A	freightweb.com.au
203.21.188.31	A	ns1.pacnat.com.au
203.21.188.32	A	ns2.pacnat.com.au