Robtex

Up: 66.6.47.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 66.6.47.128/26
Down right: 66.6.47.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.6.47.252	A+PTR	lo0.core01.dfw01.as33612.net
66.6.47.252	PTR	lo0.edge01.ewr01.as33612.net
66.6.47.252	A	lo0.re0.edge01.ewr01.as33612.net
66.6.47.255	A+PTR	lo0.edge01.dfw01.as33612.net
66.6.47.255	A	edge01.dfw01.as33612.net