Robtex

Up: 81.30.220.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 81.30.220.0/24
Down right: 81.30.221.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.30.220.27	PTR	81.30.220.27.static.ufanet.ru
81.30.220.92	PTR	81.30.220.92.static.ufanet.ru
81.30.220.92	A	ufajap.ru
81.30.220.111	PTR	81.30.220.111.static.ufanet.ru
81.30.220.111	A	elips.su
81.30.220.154	A+PTR	81.30.220.154.static.ufanet.ru
81.30.220.183	PTR	81.30.220.183.static.ufanet.ru
81.30.220.183	A	www.root-project.ru
81.30.220.183	A	root-project.ru
81.30.220.191	PTR	81.30.220.191.static.ufanet.ru
81.30.220.191	A	3e-club.ru
81.30.220.191	A	mx.ally-kyoto.com
81.30.220.209	A	mail.ufagkb21.ru
81.30.220.245	PTR	81.30.220.245.static.ufanet.ru
81.30.220.245	A	sp9-ufa.ru
81.30.220.245	A	detpol4.ru
81.30.221.11	PTR	81.30.221.11.dynamic.ufanet.ru
81.30.221.11	A	ognevskiy.com
81.30.221.30	A+PTR	81.30.221.30.dynamic.ufanet.ru
81.30.221.84	A+PTR	81.30.221.84.dynamic.ufanet.ru
81.30.221.110	A+PTR	81.30.221.110.dynamic.ufanet.ru
81.30.221.110	A	atoly.ru
81.30.221.110	A	www.atoly.ru
81.30.221.117	PTR	81.30.221.117.dynamic.ufanet.ru
81.30.221.117	A	bashtex.ru
81.30.221.117	A	mail.ye02.ru
81.30.221.145	A	scaledteam.ru
81.30.221.145	A	www.scaledteam.ru
81.30.221.186	A	devflavor.com
81.30.221.189	A	81.30.221.189.dynamic.ufanet.ru
81.30.221.191	A	81.30.221.191.dynamic.ufanet.ru
81.30.221.234	A+PTR	81.30.221.234.dynamic.ufanet.ru
81.30.221.240	PTR	81.30.221.240.dynamic.ufanet.ru
81.30.221.241	A	targ1988.ru
81.30.221.251	PTR	81.30.221.251.dynamic.ufanet.ru
81.30.221.255	PTR	81.30.221.255.dynamic.ufanet.ru