Robtex

Up: 77.235.216.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.235.216.0/25
Down right: 77.235.216.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.235.216.178	PTR	mail.kompak18.ru
77.235.216.236	PTR	mail.directum.ru
77.235.216.254	PTR	relay.izhevsk.ptl.ru
77.235.216.254	A	117.54.175.79.izhevsk.ptl.ru
77.235.216.254	A	122.36.175.79.izhevsk.ptl.ru