Robtex

Up: 192.207.126.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.207.126.0/25
Down right: 192.207.126.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.207.126.6	A+PTR	ns1.pfmechanics.com
192.207.126.6	A	hosaka.smallworks.com
192.207.126.6	A	ns1.netgate.com
192.207.126.7	PTR	ns2.pfmechanics.com
192.207.126.7	A	ns3.pfmechanics.com
192.207.126.7	A	ns2.pfmechanics.net