Robtex

Up: 212.232.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.232.17.0/25
Down right: 212.232.17.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.232.17.73	A+PTR	ipgate.sk
212.232.17.98	PTR	viptel.sk
212.232.17.98	A	viptel.org
212.232.17.98	A	viptel.cz
212.232.17.99	A+PTR	mail.vmtele.com
212.232.17.99	A	mail.visionmedia.sk
212.232.17.100	A+PTR	ns.vmtele.com
212.232.17.100	A	ns.visionmedia.sk