Robtex

Up: 112.73.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 112.73.12.0/23
Down right: 112.73.14.0/23

IP	Type	Hostname
112.73.12.16	PTR	ns2.eflydns.net
112.73.12.16	PTR	ns1.eflydns.net
112.73.12.21	PTR	ns2.eflydns.net
112.73.12.21	PTR	ns1.eflydns.net
112.73.12.60	PTR	ns2.eflydns.net
112.73.12.60	PTR	ns1.eflydns.net
112.73.12.71	PTR	hello.network
112.73.12.140	PTR	hello.network
112.73.12.145	PTR	ns1.eflydns.net
112.73.12.145	PTR	ns2.eflydns.net
112.73.12.147	PTR	ns2.eflydns.net
112.73.12.147	PTR	ns1.eflydns.net
112.73.12.163	PTR	ns1.eflydns.net
112.73.12.163	PTR	ns2.eflydns.net
112.73.12.211	PTR	ns1.eflydns.net
112.73.12.211	PTR	ns2.eflydns.net
112.73.15.90	PTR	ns2.eflydns.net
112.73.15.90	PTR	ns1.eflydns.net