Robtex

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

IP	Type	Hostname
2600:3c00::1	A	mail.texas-stairlift.com
2600:3c00::1	A	texas-stairlift.com
2600:3c00::2	PTR	resolver01.dallas.linode.com
2600:3c00::2	A	resolver1.dallas.linode.com
2600:3c00::2	A	mail.american-design-concepts.com
2600:3c00::3	PTR	resolver02.dallas.linode.com
2600:3c00:e000:10::1	PTR	monty.scottdial.com
2600:3c00:e000:10::1	A	dns1.scottdial.com
2600:3c00:e000:10::1	A	*.scottdial.com
2600:3c00:e000:10::2	PTR	sagittaron.airaim.com
2600:3c00:e000:14::237	PTR	us01-na.bisnismedia.net