Robtex

Up: 81.230.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.230.72.0/25
Down right: 81.230.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.230.72.113	A+PTR	81-230-72-113-no201.tbcn.telia.com
81.230.72.169	A+PTR	81-230-72-169-no201.tbcn.telia.com
81.230.72.169	A	carlfalk.se
81.230.72.169	A	avonial.com
81.230.72.247	A+PTR	81-230-72-247-no201.tbcn.telia.com