Robtex

Up: 68.232.190.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 68.232.191.0/25
Down right: 68.232.191.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.232.191.0	PTR	68.232.191.0.choopa.net
68.232.191.21	PTR	68.232.191.21.choopa.net
68.232.191.149	PTR	68.232.191.149.choopa.net
68.232.191.155	PTR	68.232.191.155.choopa.net
68.232.191.191	A+PTR	ns1.choopadns.com
68.232.191.191	A	rns1.choopadns.com
68.232.191.191	A	ns1.unmeteredservers.com
68.232.191.231	PTR	68.232.191.231.choopa.net
68.232.191.232	A+PTR	ns2.choopadns.com
68.232.191.232	A	ns2.sf-n.com
68.232.191.232	A	ns2.choopa.com
68.232.191.255	PTR	68.232.191.255.choopa.net