Robtex

Up: 2001:500:18::/47
Can't show all results, try to descend to a more specific CIDR
Down left: 2001:500:19::/49
Down right: 2001:500:19:8000::/49

IP	Type	Hostname
2001:500:19::1	A+PTR	a0.info.afilias-nst.org
2001:500:19::1	A	a0.info.afilias-nst.info
2001:500:19::221	A+PTR	a.service21.afiliasdns.info
2001:500:19::221	A	ns3.blacknight.com
2001:500:19::222	PTR	a.service22.afiliasdns.info
2001:500:19::250	PTR	ns1.idomains.com