Robtex

Up: 81.90.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.90.224.0/22
Down right: 81.90.228.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.90.224.0	PTR	bs-vm-net-1.radiocom.net.ua
81.90.224.1	A+PTR	ns.radiocom.net.ua
81.90.224.63	PTR	bs-vm-net-1-broadcast.radiocom.net.ua
81.90.224.91	PTR	pppoe-ng-81-90-224-91.radiocom.net.ua
81.90.224.113	PTR	pppoe-ng-81-90-224-113.radiocom.net.ua
81.90.224.128	PTR	pppoe-ng-81-90-224-128.radiocom.net.ua
81.90.224.145	PTR	pppoe-ng-81-90-224-145.radiocom.net.ua
81.90.224.160	PTR	pppoe-ng-81-90-224-160.radiocom.net.ua
81.90.224.192	PTR	bs-av-net-1.radiocom.net.ua
81.90.224.193	PTR	av3.radiocom.net.ua
81.90.224.193	PTR	ns2.radiocom.net.ua
81.90.224.193	A	av.radiocom.net.ua
81.90.224.204	A	ns.vikom.com.ua
81.90.225.8	PTR	vpn.radiocom.net.ua
81.90.225.99	PTR	ib-cst.radiocom.net.ua
81.90.225.99	A	cst.radiocom.net.ua
81.90.225.100	A+PTR	ib-vm.radiocom.net.ua
81.90.225.243	A+PTR	microcom-office-2.radiocom.net.ua
81.90.225.245	A	mx.kson.zp.ua
81.90.225.245	A	kson.zp.ua
81.90.225.245	A	mx.gasanov.com
81.90.226.1	A	cst-obl.radiocom.net.ua
81.90.226.11	PTR	autolux.zp.ua
81.90.226.11	A	relay1.autolux.zp.ua
81.90.226.11	A	microcom5.radiocom.net.ua
81.90.226.17	A+PTR	smtp2.uft.zp.ua
81.90.226.18	A+PTR	srv.uft.zp.ua
81.90.226.19	PTR	ufarma-19.radiocom.net.ua
81.90.226.19	A	uft.zp.ua
81.90.226.19	A	apt.co.ua
81.90.226.20	PTR	apt.co.ua
81.90.226.32	PTR	tibet.dp.ua
81.90.226.34	A+PTR	rcom.molis.ua
81.90.226.34	A	relay.molis.ua
81.90.226.34	A	vpn.molis.ua
81.90.226.35	A	relay.eximtrade.com.ua
81.90.226.39	A	vpn.molis.ua
81.90.226.40	A+PTR	mail.ice-cream.com.ua
81.90.226.49	PTR	microcom27-gw.radiocom.net.ua
81.90.226.97	A	colo.radiocom.net.ua
81.90.226.98	PTR	hostedby.radiocom.net.ua
81.90.226.98	A	sintek.zp.ua
81.90.226.98	A	www.sintsaver.com.ua
81.90.226.104	A	politsovet.com
81.90.226.104	A	new.privet.zp.ua
81.90.226.107	PTR	hostedby2.radiocom.net.ua
81.90.226.107	A	otvet.zp.ua
81.90.226.107	A	www.otvet.zp.ua
81.90.226.196	A+PTR	relay1.market-group.zp.ua
81.90.226.196	A	market-group.zp.ua
81.90.226.221	PTR	kofe-time-lenina92.radiocom.net.ua
81.90.226.228	A	microcom1.radiocom.net.ua
81.90.226.228	A	ns2.microcom.net.ua
81.90.226.230	A	market-group.radiocom.net.ua
81.90.226.230	A	mg-alpha-central.radiocom.net.ua
81.90.226.233	A+PTR	microcom5-4.radiocom.net.ua
81.90.226.233	A	mx.alexander-corp.com
81.90.226.233	A	www.ritm.zp.ua
81.90.226.250	A	microcom22-new.radiocom.net.ua
81.90.226.251	A	microcom22-1-new.radiocom.net.ua
81.90.227.12	PTR	znp-novobogdan.radiocom.net.ua
81.90.227.65	A+PTR	mel.radiocom.net.ua
81.90.227.75	PTR	kronos.mel.radiocom.net.ua
81.90.227.205	PTR	rezerved-for-microcom.radiocom.net.ua
81.90.227.210	PTR	olis-vasilevka.radiocom.net.ua
81.90.227.230	PTR	mail.ute.zp.ua
81.90.228.1	A+PTR	oblstat.radiocom.net.ua
81.90.228.1	A	klishin.radiocom.net.ua
81.90.228.1	A	ns3.radiocom.net.ua
81.90.228.8	A	boss.radiocom.net.ua
81.90.228.15	A+PTR	bmx.radiocom.net.ua
81.90.228.15	PTR	postman.radiocom.net.ua
81.90.228.15	PTR	mail.rcom.zp.ua
81.90.228.16	A+PTR	techsup.radiocom.net.ua
81.90.228.19	A	core.radiocom.net.ua
81.90.228.30	A	admin.radiocom.net.ua
81.90.228.58	PTR	pppoe-ng-81-90-228-58.radiocom.net.ua
81.90.228.58	A	mx.arthobby.zp.ua
81.90.228.105	PTR	ort.zp.ua
81.90.228.105	PTR	mx.ort.zp.ua
81.90.228.131	PTR	pppoe-radiorynok-81-90-228-131.radiocom.net.ua
81.90.228.170	A+PTR	mail2.zog.com.ua
81.90.228.170	A	autovisio.com.ua
81.90.228.228	PTR	radiorynok.radiocom.net.ua
81.90.228.228	A	vikom.com.ua
81.90.229.131	PTR	novopoltavskiy-karyer.radiocom.net.ua
81.90.229.146	A+PTR	mx2.kpf.zp.ua
81.90.229.153	PTR	kirillovka3-gw.radiocom.net.ua
81.90.229.182	PTR	znp-kuybishevo.radiocom.net.ua
81.90.230.14	A+PTR	kaltsev.radiocom.net.ua
81.90.230.18	PTR	znu2.radiocom.net.ua
81.90.230.26	PTR	magnoliya-zaporozhskaya6.radiocom.net.ua
81.90.230.54	A	mx4.zhu.edu.ua
81.90.230.58	A+PTR	wk.abrasha.net
81.90.230.58	A	dobrakhata.ua
81.90.230.58	A	dobrahata.kiev.ua
81.90.230.59	PTR	lev2000.com.ua
81.90.230.110	PTR	mail.kronos.zp.ua
81.90.230.118	PTR	microcom26.radiocom.net.ua
81.90.230.162	PTR	mail.ost-west.com.ua
81.90.230.169	PTR	cst-olis-td-ooo-karpenko-karogo47-gw.radiocom.net.ua
81.90.230.170	PTR	radiocom.olis.zp.ua
81.90.230.170	A+PTR	radiocom.td-olis.zp.ua
81.90.230.170	A	td-olis.zp.ua
81.90.230.218	PTR	mx.microcom.net.ua
81.90.230.218	A	mx.voiptrade.com.ua
81.90.230.218	A	relay1.microcom.zp.ua
81.90.230.226	PTR	unikon-lenina152.radiocom.net.ua
81.90.230.226	A	relay.unikon.com.ua
81.90.230.226	A	unikon.com.ua
81.90.230.250	A+PTR	znu.radiocom.net.ua
81.90.230.250	A	znu.edu.ua
81.90.230.250	A	ns1.visnykznu.org
81.90.231.179	PTR	pppoe-81-90-231-179.radiocom.net.ua