Robtex

Up: 81.30.204.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.30.204.0/25
Down right: 81.30.204.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.30.204.10	A+PTR	81.30.204.10.static.ufanet.ru
81.30.204.16	A	tsb.ufanet.ru
81.30.204.35	A	adss.ufanet.ru
81.30.204.51	PTR	mail.uftgt.ru
81.30.204.69	A+PTR	nl.ufanet.ru
81.30.204.99	A	transterm.ufanet.ru
81.30.204.183	PTR	mail.pintabeer.ru
81.30.204.221	PTR	inform.ufanet.ru
81.30.204.242	A+PTR	mail.bashkomsnabbank.ru
81.30.204.242	A	mail.oplatipokarte.ru
81.30.204.242	A	mail.bcsb.ru
81.30.204.250	PTR	bashinform.ru
81.30.204.250	A	*.bashvest.ru
81.30.204.250	A	bashvest.ru
81.30.204.254	PTR	81.30.204.254.static.ufanet.ru
81.30.204.254	A	mail.school39.ru