Robtex

Up: 81.30.210.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.30.210.0/25
Down right: 81.30.210.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.30.210.0	PTR	81.30.210.0.static.ufanet.ru
81.30.210.22	PTR	81.30.210.22.static.ufanet.ru
81.30.210.22	A	ugkb18.ru
81.30.210.22	A	www.ugkb18.ru
81.30.210.118	PTR	81.30.210.118.static.ufanet.ru
81.30.210.150	PTR	mail.gaz-servis.ru