Robtex

Up: 77.236.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 77.236.64.0/23
Down right: 77.236.66.0/23
(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	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
77.236.65.15	PTR	77.236.65.15.impuls-perm.ru
77.236.65.70	PTR	mail.unk.perm.ru
77.236.65.77	PTR	77.236.65.77.impuls-perm.ru
77.236.65.77	A	helios.perm.ru
77.236.65.77	A	mail.helios.perm.ru
77.236.65.84	PTR	dkfperm.ru
77.236.65.84	PTR	dkf.i-perm.ru
77.236.65.122	A+PTR	mail.pkk.perm.ru
77.236.65.146	PTR	77.236.65.146.impuls-perm.ru
77.236.65.152	PTR	perm.uralparfum.ru
77.236.65.159	A+PTR	mail.garant-pack.ru
77.236.65.186	A+PTR	relay.rekon.i-perm.ru
77.236.65.186	A	rekon.i-perm.ru
77.236.65.221	PTR	77.236.65.221.impuls-perm.ru
77.236.66.1	A+PTR	ns3.i-perm.ru
77.236.66.6	PTR	77.236.66.6.impuls-perm.ru
77.236.66.6	A	mail.kitgroup.ru
77.236.66.6	A	kitgroup.ru
77.236.66.42	A	mail.somehsa.sg
77.236.66.58	A	prk.perm.ru
77.236.66.90	A+PTR	mx2.foodtrade.ru
77.236.66.90	A	mail.foodtrade.ru
77.236.66.90	A	foodtrade.ru
77.236.66.106	A+PTR	nsisp.impuls-perm.ru
77.236.66.108	A+PTR	ispvesta2.impuls-perm.ru
77.236.66.110	A	ns10.impuls-perm.ru
77.236.66.130	PTR	77.236.66.130.impuls-perm.ru
77.236.66.130	A	most123.ru
77.236.66.131	A	svdc.most123.ru
77.236.66.146	PTR	mail2.mes.perm.ru
77.236.66.146	A	mes.perm.ru
77.236.66.147	A	app2.mes.perm.ru
77.236.66.180	A+PTR	mail.portperm.com
77.236.66.194	A	ztk.perm.ru
77.236.66.254	PTR	77.236.66.254.impuls-perm.ru
77.236.67.16	PTR	77.236.67.16.impuls-perm.ru
77.236.67.73	PTR	77.236.67.73.impuls-perm.ru
77.236.67.92	PTR	77.236.67.92.impuls-perm.ru
77.236.67.124	PTR	77.236.67.124.impuls-perm.ru
77.236.67.127	PTR	77.236.67.127.impuls-perm.ru
77.236.67.194	PTR	77.236.67.194.impuls-perm.ru
77.236.67.214	PTR	77.236.67.214.impuls-perm.ru
77.236.67.225	PTR	77.236.67.225.impuls-perm.ru
77.236.67.241	PTR	77.236.67.241.impuls-perm.ru
77.236.67.246	PTR	77.236.67.246.impuls-perm.ru