Robtex

Up: 81.222.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.222.96.0/21
Down right: 81.222.104.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.222.96.7	PTR	mail.astelnet.net
81.222.96.7	A	mail.novatele.ru
81.222.96.38	A+PTR	nmsif.if.ru
81.222.96.38	A	pws.if.ru
81.222.96.38	A	mx.nmsif.if.ru
81.222.98.22	PTR	ns.bank-peresvet.ru
81.222.98.146	PTR	ascorus.ru
81.222.102.2	A	mail.rizs.ru
81.222.102.2	A	shzhonglu.com.cn
81.222.102.10	A	rosinfonet.ru
81.222.102.10	A	www.rosinfonet.ru
81.222.102.130	A	ns1.rindns.net
81.222.102.133	A	nregion.com
81.222.102.133	A	www.nregion.com
81.222.102.139	A	m-im.ru
81.222.102.149	A	prcom.su
81.222.102.149	A	promocom.su
81.222.102.149	A	sedoymaniac.ru
81.222.102.162	A	politsvoboda.ru
81.222.102.184	A	postsoviet.info
81.222.102.200	A	mail.rosinfonet.ru
81.222.102.200	A	mail.rindns.net
81.222.102.242	A	mail.prcom.su
81.222.103.2	A+PTR	sip.if.ru
81.222.103.4	A+PTR	gate.if.ru
81.222.103.6	A+PTR	hp.if.ru
81.222.103.7	A+PTR	can.if.ru
81.222.103.150	A	riotel.ru
81.222.104.149	A	mail.konstanta1c.ru
81.222.104.150	A	mail.konstanta1c.ru
81.222.105.24	A+PTR	ns1.astelhost.net
81.222.105.25	PTR	ns1.optiroam.net
81.222.105.25	A	ns2.optiroam.net
81.222.105.25	A	ns1m.astelhost.net
81.222.105.110	A	zabbix.astelnet.ru
81.222.105.119	A	goluboe.org
81.222.105.250	A+PTR	mail2.astelnet.net
81.222.107.24	A	siplink.ru
81.222.108.28	PTR	relay.pmsoft.ru
81.222.111.212	A+PTR	sip.mgline.ru
81.222.111.212	A	mgline.ru
81.222.111.212	A	xn--80aftgdk.xn--p1ai
81.222.111.221	A	pbx.mgline.ru
81.222.111.228	A+PTR	pbx.astelnet.net
81.222.111.231	A+PTR	mail.mgline.ru
81.222.111.232	A	mgline.net
81.222.111.232	A	mgline.eu