Robtex

Up: 163.47.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 163.47.204.0/23
Down right: 163.47.206.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
163.47.206.2	A	ns1.nameserver.com.au
163.47.206.2	A	ns1.cloudiodns.com
163.47.206.2	A	ns2.cloudio.net.au
163.47.206.4	A	dns4.echoman.com.au
163.47.206.4	A	ns4.powerdns.co.nz
163.47.206.4	A	ns4.cloudiodns.com