Robtex

Up: 80.173.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 80.173.0.0/18
Down right: 80.173.64.0/18

IP	Type	Hostname
80.173.0.0	A+PTR	80.173.0.0.dyn.user.ono.com
80.173.0.2	A	80.173.0.2.dyn.user.ono.com
80.173.1.0	PTR	80.173.1.0.dyn.user.ono.com
80.173.1.13	A	80.173.1.13.dyn.user.ono.com
80.173.3.2	A	80.173.3.2.dyn.user.ono.com
80.173.3.50	A	80.173.3.50.dyn.user.ono.com
80.173.7.2	PTR	80.173.7.2.dyn.user.ono.com
80.173.13.2	A+PTR	80.173.13.2.dyn.user.ono.com
80.173.14.0	A	80.173.14.0.dyn.user.ono.com
80.173.15.2	A+PTR	80.173.15.2.dyn.user.ono.com
80.173.15.21	A	80.173.15.21.dyn.user.ono.com
80.173.26.2	A+PTR	80.173.26.2.dyn.user.ono.com
80.173.30.160	A	80.173.30.160.dyn.user.ono.com
80.173.30.171	A	80.173.30.171.dyn.user.ono.com
80.173.32.0	PTR	80.173.32.0.dyn.user.ono.com
80.173.39.150	A	80.173.39.150.dyn.user.ono.com
80.173.49.40	A	schevka.sk
80.173.64.33	A	80.173.64.33.dyn.user.ono.com
80.173.126.210	A	80.173.126.210.dyn.user.ono.com