Robtex

Up: 91.231.192.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 91.231.196.0/23
Down right: 91.231.198.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.231.196.1	A+PTR	ns1.gamma2service.ru
91.231.196.1	A	renzhina.com
91.231.196.1	A	update.l2r.ru
91.231.196.26	PTR	sberbank.igamma.ru
91.231.196.27	A+PTR	igamma.ru
91.231.196.27	A	air59.ru
91.231.196.27	A	avramenko.su
91.231.196.67	PTR	perm-at.ru
91.231.196.75	PTR	perm-91-231-196-75.gamma2service.ru
91.231.196.90	PTR	gw.perm.inprom.ru
91.231.196.124	PTR	perm-91-231-196-124.gamma2service.ru
91.231.196.124	A	rusles59.ru
91.231.196.129	PTR	perm-91-231-196-129.gamma2service.ru
91.231.196.129	A	stsperm.ru
91.231.196.129	A	mail.stsperm.ru
91.231.196.228	PTR	perm-91-231-196-228.gamma2service.ru
91.231.196.230	PTR	perm-91-231-196-230.gamma2service.ru
91.231.196.230	A	mail2.siburperm.ru
91.231.197.193	PTR	perm-91-231-197-193.gamma2service.ru
91.231.197.194	PTR	perm-91-231-197-194.gamma2service.ru
91.231.197.195	PTR	perm-91-231-197-195.gamma2service.ru
91.231.197.197	PTR	perm-91-231-197-197.gamma2service.ru
91.231.197.201	PTR	perm-91-231-197-201.gamma2service.ru
91.231.197.204	PTR	perm-91-231-197-204.gamma2service.ru
91.231.197.208	PTR	perm-91-231-197-208.gamma2service.ru
91.231.197.217	PTR	perm-91-231-197-217.gamma2service.ru
91.231.197.220	PTR	perm-91-231-197-220.gamma2service.ru
91.231.197.223	PTR	perm-91-231-197-223.gamma2service.ru
91.231.197.225	PTR	perm-91-231-197-225.gamma2service.ru
91.231.198.1	PTR	perm-91-231-198-1.gamma2service.ru
91.231.198.2	PTR	perm-91-231-198-2.gamma2service.ru
91.231.198.7	PTR	perm-91-231-198-7.gamma2service.ru
91.231.198.12	PTR	perm-91-231-198-12.gamma2service.ru
91.231.198.78	PTR	perm-91-231-198-78.gamma2service.ru
91.231.199.1	A+PTR	ns2.gamma2service.ru