Robtex

Up: 2600:3c00::/31
Can't show all results, try to descend to a more specific CIDR
Down left: 2600:3c01::/33
Down right: 2600:3c01:8000::/33
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2600:3c01::2	A+PTR	resolver01.fremont.linode.com
2600:3c01::2	A	resolver1.fremont.linode.com
2600:3c01::3	A+PTR	resolver02.fremont.linode.com
2600:3c01::4	A+PTR	resolver03.fremont.linode.com
2600:3c01:e000:7::1	A+PTR	dione.cbane.org
2600:3c01:e000:7::1	A	cbane.org
2600:3c01:e000:7::1	A	www.cbane.org
2600:3c01:e000:c::4	PTR	welcome.to.pandoras.box.panicbnc.us