Robtex

Up: 192.9.170.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.9.171.0/25
Down right: 192.9.171.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.9.171.171	A	mailin01.netbeans.org
192.9.171.171	A	mail.network.org
192.9.171.171	A	mailin01.java.net
192.9.171.174	A	mail.network.org
192.9.171.174	A	mailin02.network.org
192.9.171.174	A	mailin02.netbeans.org