Robtex

Up: 91.192.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 91.192.128.0/23
Down right: 91.192.130.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.192.128.0	PTR	subnet-128-0.lan-telecom.net
91.192.128.1	PTR	ns.yuzhny.com
91.192.128.1	A	relay.lan-tele.com
91.192.128.1	A	lan-telecom.org
91.192.128.2	PTR	ns.lan-telecom.net
91.192.128.13	PTR	core.lan-telecom.net
91.192.128.18	A+PTR	voip-mc.lan-telecom.net
91.192.128.19	A+PTR	voip-vg.lan-telecom.net
91.192.128.19	A	storm.lan-telecom.net
91.192.128.20	PTR	voip-vc.lan-telecom.net
91.192.128.33	PTR	edge.lan-telecom.net
91.192.128.34	A+PTR	fire.lan-telecom.net
91.192.128.34	A	www.yuzhny.com
91.192.128.34	A	gazon.odessa.net
91.192.128.35	PTR	pegas.lan-telecom.net
91.192.128.35	A	omm.od.ua
91.192.128.36	PTR	fugas.lan-telecom.net
91.192.128.36	A	www.lovegarden.com.ua
91.192.128.36	A	relay.coot.com.ua
91.192.128.37	PTR	soxx.lan-telecom.net
91.192.128.39	PTR	suxx.lan-telecom.net
91.192.128.40	A+PTR	saxx.lan-telecom.net
91.192.128.41	PTR	sixx.lan-telecom.net
91.192.128.41	A	www.elladahotel.com
91.192.128.41	A	elladahotel.com
91.192.128.49	PTR	edge.lan-telecom.net
91.192.128.52	A	mail.dm.od.ua
91.192.128.54	A+PTR	moon.lan-telecom.net
91.192.128.54	A	relay.mediafolder.net
91.192.128.54	A	www.mediafolder.net
91.192.128.56	A	cs.odessa.net
91.192.128.57	A+PTR	soul.lan-telecom.net
91.192.128.68	A	orion3.lan-telecom.net
91.192.128.85	PTR	tyan.lan-telecom.net
91.192.128.92	PTR	ipcam3.lan-telecom.net
91.192.128.94	PTR	mcast-128-94.lan-telecom.net
91.192.128.97	PTR	gate.lan-telecom.net
91.192.128.97	A	edge.lan-telecom.net
91.192.128.99	A	home.lan-telecom.net
91.192.128.103	PTR	bcast-128-103.lan-telecom.net
91.192.128.106	A	home.lan-telecom.net
91.192.128.121	PTR	tornado.lan-telecom.net
91.192.128.158	PTR	mcr.lan-telecom.net
91.192.128.161	PTR	tornado.lan-telecom.net
91.192.128.253	A	fsk.yuzhny.com
91.192.128.254	A+PTR	opz.lan-telecom.net
91.192.128.254	A	opz.yuzhny.com
91.192.129.3	PTR	3.lan-telecom.net
91.192.129.43	PTR	ip-pool-22-3.lan-telecom.net
91.192.129.67	PTR	67.lan-telecom.net
91.192.129.158	PTR	158.lan-telecom.net
91.192.130.158	PTR	158.lan-telecom.net
91.192.130.210	PTR	210.lan-telecom.net
91.192.131.0	PTR	ip-pool-00-nat-00.lan-telecom.net
91.192.131.1	PTR	ip-pool-01-nat-01.lan-telecom.net
91.192.131.15	PTR	ip-pool-15-nat-23.lan-telecom.net
91.192.131.116	A	fsk.yuzhny.com
91.192.131.117	PTR	medved.lan-telecom.net
91.192.131.118	PTR	wallart.lan-telecom.net
91.192.131.119	PTR	olimp.lan-telecom.net
91.192.131.120	PTR	opz-ext.odessa.ua
91.192.131.121	A+PTR	opz.odessa.ua
91.192.131.121	A	mail.opz.odessa.net
91.192.131.121	A	relay.opz.odessa.ua
91.192.131.122	PTR	opz-ext.odessa.ua
91.192.131.123	PTR	opz-ext.odessa.ua
91.192.131.124	PTR	opz-ext.odessa.ua
91.192.131.125	PTR	opz.yuzhny.com
91.192.131.126	PTR	opz-ext.odessa.ua
91.192.131.127	PTR	opz-ext.odessa.ua
91.192.131.135	A	ibetrade.yuzhny.com
91.192.131.136	PTR	olviya.yuzhny.com
91.192.131.137	PTR	opz-voip.yuzhny.com
91.192.131.143	A+PTR	sklad.yuzhny.com
91.192.131.145	A	ammiak.yuzhny.com
91.192.131.149	A+PTR	prof.yuzhny.com
91.192.131.151	A+PTR	yuma.yuzhny.com
91.192.131.151	A	www.kcpbhc.com
91.192.131.151	A	kcpbhc.com
91.192.131.154	PTR	154.lan-telecom.net
91.192.131.154	A	mail.yuz.uspa.gov.ua
91.192.131.154	A	yuz.uspa.gov.ua
91.192.131.207	PTR	207.lan-telecom.net
91.192.131.218	A+PTR	uar.yuzhny.gov.ua
91.192.131.221	A+PTR	vhv-stb.lan-telecom.net
91.192.131.222	A+PTR	fki.yuzhny.gov.ua
91.192.131.227	A	relay.yuzhny.gov.ua
91.192.131.231	PTR	bcast-131-231.lan-telecom.net
91.192.131.234	A	vekka.lan-telecom.net
91.192.131.234	A	vekka.yuzhny.com
91.192.131.235	PTR	vekka-235.lan-telecom.net
91.192.131.242	A+PTR	s0403-2.deltawilmar.com
91.192.131.242	A	mx2.deltawilmar.com