Robtex

Up: 2400:8900::/31
Can't show all results, try to descend to a more specific CIDR
Down left: 2400:8901::/33
Down right: 2400:8901:8000::/33
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2400:8901::5	A+PTR	resolver04.singapore.linode.com
2400:8901::4b	A	speedtest.singapore.linode.com
2400:8901::f03c:91ff:fe00:2ff1	A	li845-114.members.linode.com
2400:8901::f03c:91ff:fe00:2ff1	A	mail.e-bikroy.com
2400:8901::f03c:91ff:fe61:2a45	A	li845-114.members.linode.com
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