Robtex

Up: 173.199.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.199.96.0/25
Down right: 173.199.96.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.199.96.13	PTR	173.199.96.13.choopa.net
173.199.96.96	PTR	ns1.vultr.com
173.199.96.96	A	ns1.techdesign.com.au
173.199.96.96	A	ns1.yasliguvenlik.com
173.199.96.97	PTR	ns2.vultr.com
173.199.96.97	A	ns2.livetvpcus.com
173.199.96.97	A	ns2.ktunprint.com