Robtex

Up: 2400:8901::/32
Can't show all results, try to descend to a more specific CIDR
Down left: 2400:8901:8000::/34
Down right: 2400:8901:c000::/34
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2400:8901:e000::2ddf	A	techhipster.net
2400:8901:e000::2ddf	A	obviouslynotarealdomain.com
2400:8901:e000::2ddf	A	realhost.name
2400:8901:e000::1:1000	PTR	gbe0.com
2400:8901:e000::1:1001	PTR	shthead.com