Robtex

Up: 81.5.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.5.73.0/25
Down right: 81.5.73.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.5.73.42	A+PTR	mail2.dsts.ru
81.5.73.73	A+PTR	kalend.mipt.ru
81.5.73.100	A	dccpp.ru
81.5.73.141	PTR	exchsrv.5karmanov.ru
81.5.73.178	A	www.auto-kam.ru
81.5.73.178	A	dm-maz.ru
81.5.73.178	A	www.autospecnaz.ru
81.5.73.180	A	mail.d-motors.ru
81.5.73.182	A	newlooks.org