Robtex

Up: 81.222.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 81.222.96.0/20
Down right: 81.222.112.0/20
(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
81.222.102.162	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
81.222.112.1	PTR	gw1.gtss.ru
81.222.112.2	PTR	gw2.gtss.ru
81.222.112.4	A	81.222.127.187.spacegate.gtss.ru
81.222.112.4	A	201.spacegate.gtss.ru
81.222.112.4	A	127.67.spacegate.gtss.ru
81.222.112.126	PTR	scs-static.gtss.ru
81.222.112.128	PTR	help-me.gtss.ru
81.222.112.133	PTR	nposp-v102cisco.gtss.ru
81.222.112.166	PTR	ws-net.gtss.ru
81.222.112.224	PTR	asvt.gtss.ru
81.222.112.225	PTR	asvt.gtss.ru
81.222.112.226	PTR	asvt.gtss.ru
81.222.112.227	PTR	asvt.gtss.ru
81.222.113.89	PTR	sb2300-113-89.gtss.ru
81.222.113.96	PTR	geo113-96.gtss.ru
81.222.113.97	PTR	polan-ipsec.gtss.ru
81.222.113.98	PTR	dalsvjaz1-sakhalin-geo.gtss.ru
81.222.113.153	PTR	primatls.ru
81.222.113.153	PTR	host666.primatls.ru
81.222.113.153	PTR	mail.primatls.ru
81.222.113.178	PTR	titanium2.dlm.ru
81.222.113.178	PTR	mail.raduga-tv.ru
81.222.114.65	PTR	65.scs.gtss.ru
81.222.114.130	PTR	130.tarkosale.yang.ru
81.222.114.130	A	ns.yang.ru
81.222.114.147	A	mail.yang.ru
81.222.115.59	PTR	mta.gtss.ru
81.222.116.51	A	bkt.81.222.116.51.gtss.ru
81.222.116.97	PTR	81.222.116.97.gtss.ru
81.222.117.4	PTR	81.222.117.4.unrouted.gtss.ru
81.222.117.35	PTR	81.222.117.35.unrouted.gtss.ru
81.222.117.66	PTR	81.222.117.66.unrouted.gtss.ru
81.222.117.96	PTR	81.222.117.96.unrouted.gtss.ru
81.222.117.129	PTR	81.222.117.129.unrouted.gtss.ru
81.222.117.160	PTR	81.222.117.160.unrouted.gtss.ru
81.222.117.162	PTR	81.222.117.162.unrouted.gtss.ru
81.222.117.195	PTR	81.222.117.195.unrouted.gtss.ru
81.222.118.34	PTR	16v.ru
81.222.118.34	PTR	index3.ru
81.222.118.34	PTR	vw-shop.ru
81.222.118.35	PTR	index3.ru
81.222.118.65	PTR	81.222.118.65.unrouted.gtss.ru
81.222.118.163	PTR	81.222.118.163.unrouted.gtss.ru
81.222.119.66	PTR	81.222.119.66.unrouted.gtss.ru
81.222.119.129	PTR	81.222.119.129.unrouted.gtss.ru
81.222.119.130	PTR	81.222.119.130.unrouted.gtss.ru
81.222.119.163	PTR	81.222.119.163.unrouted.gtss.ru
81.222.119.193	PTR	81.222.119.193.unrouted.gtss.ru
81.222.119.226	PTR	81.222.119.226.unrouted.gtss.ru
81.222.119.227	PTR	81.222.119.227.unrouted.gtss.ru
81.222.121.81	A	urengoj.yang.ru
81.222.121.109	PTR	neryungri.ru
81.222.121.119	PTR	mail.stinet.ru
81.222.121.127	PTR	mail1.primatls.ru
81.222.124.6	PTR	gazpromftp.gtss.ru
81.222.124.34	PTR	renfilmftp.gtss.ru
81.222.125.2	PTR	mail.taimyr24.ru
81.222.127.1	PTR	81.222.127.1.spacegate.gtss.ru
81.222.127.2	PTR	mail.sputnik.sg
81.222.127.32	PTR	81.222.127.32.spacegate.gtss.ru
81.222.127.97	PTR	81.222.127.97.spacegate.gtss.ru
81.222.127.98	PTR	81.222.127.98.spacegate.gtss.ru
81.222.127.129	PTR	81.222.127.129.spacegate.gtss.ru
81.222.127.130	PTR	81.222.127.130.spacegate.gtss.ru
81.222.127.141	A	ns1.xietryx.com
81.222.127.142	A	voips.zaoproxy.ru
81.222.127.192	PTR	81.222.127.192.spacegate.gtss.ru
81.222.127.224	PTR	81.222.127.224.spacegate.gtss.ru
81.222.127.225	PTR	81.222.127.225.spacegate.gtss.ru
81.222.127.226	PTR	81.222.127.226.spacegate.gtss.ru