Robtex

Up: 80.73.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.73.241.0/25
Down right: 80.73.241.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.73.241.20	A+PTR	ip-80-73-241-20.cyberservice.net
80.73.241.20	A	invoke.ws
80.73.241.20	A	ns2.21er.org
80.73.241.30	A+PTR	ip-80-73-241-30.cyberservice.net
80.73.241.30	A	xios.at
80.73.241.30	A	mail.xios.at