Robtex

Up: 64.99.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.99.96.0/25
Down right: 64.99.96.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.99.96.32	PTR	ns3.tucows.com
64.99.96.33	A+PTR	ns3.hover.com
64.99.96.33	A	dns3.hover.com
64.99.96.33	A	ns3.masanet.org
64.99.96.34	A+PTR	ns3.mdnsservice.com
64.99.96.34	A	ns03.webdivisor.com
64.99.96.34	A	ns3.weblord.ca
64.99.96.35	A+PTR	ns3.shopco.com
64.99.96.36	A+PTR	ns3.systemdns.com
64.99.96.36	A	ns3.ah-dns.net
64.99.96.36	A	n3.zone.net
64.99.96.37	PTR	ld1.mdnsservice.com