Robtex

Up: 77.236.64.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.236.64.0/25
Down right: 77.236.64.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.236.64.22	PTR	im-ix.em-net.ru
77.236.64.41	PTR	77.236.64.41.impuls-perm.ru
77.236.64.74	PTR	77.236.64.74.impuls-perm.ru
77.236.64.78	PTR	77.236.64.78.impuls-perm.ru
77.236.64.156	PTR	77.236.64.156.impuls-perm.ru
77.236.64.195	PTR	ns1.impuls-perm.ru
77.236.64.195	A	ns1.i-perm.ru
77.236.64.196	PTR	ns2.i-perm.ru
77.236.64.196	A	ns11.impuls-perm.ru
77.236.64.198	PTR	nsh.i-perm.ru
77.236.64.199	PTR	isp.impuls-perm.ru
77.236.64.199	A	mail.xn--90aflann3aq8ei3a.xn--p1ai
77.236.64.199	A	tourgoodyear.ru
77.236.64.202	PTR	mail.impuls-perm.ru
77.236.64.203	PTR	mail.impuls-perm.ru
77.236.64.204	PTR	77.236.64.204.impuls-perm.ru
77.236.64.204	A	gamenet.perm.ru
77.236.64.205	A+PTR	ispvesta.impuls-perm.ru
77.236.64.205	A	npoimpuls.com
77.236.64.205	A	www.telint.ru
77.236.64.208	A+PTR	ispcp.impuls-perm.ru
77.236.64.212	A+PTR	complir.impuls-perm.ru
77.236.64.212	A	kamvodput.ru
77.236.64.212	A	atbgorod.perm.ru
77.236.64.215	A+PTR	smtp.i-perm.ru
77.236.64.215	A	mx5.impuls-perm.ru
77.236.64.223	PTR	77.236.64.223.impuls-perm.ru
77.236.64.231	PTR	ispm.impuls-perm.ru
77.236.64.231	A	www.torumk.ru
77.236.64.231	A	mail.impuls-perm.ru
77.236.64.232	A+PTR	ns7.impuls-perm.ru
77.236.64.243	PTR	zentyal.npoimpuls.com
77.236.64.248	PTR	77.236.64.248.impuls-perm.ru
77.236.64.248	A	em-net.net
77.236.64.250	PTR	ldap.npoimpuls.com
77.236.64.251	PTR	isp.vital.perm.ru
77.236.64.251	A	xn--80aehofetiflpg.xn--p1ai
77.236.64.251	A	em-net.su
77.236.64.252	PTR	spectrum.impuls-perm.ru