Robtex

Up: 31.192.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 31.192.64.0/20
Down right: 31.192.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.192.64.185	A	chemtrade.cz
31.192.65.1	PTR	1.65.net-connect.cz
31.192.65.32	PTR	32.65.net-connect.cz
31.192.65.35	A	mail.prumyslovka.cz
31.192.65.131	PTR	131.65.net-connect.cz
31.192.65.159	A	mail.omscz.cz
31.192.65.159	A	omscz.cz
31.192.65.160	PTR	160.65.net-connect.cz
31.192.65.195	PTR	195.65.net-connect.cz
31.192.65.198	A	hnilica.cz
31.192.65.199	A	mail.detskydomovhodonin.cz
31.192.65.200	A	tttisk.cz
31.192.65.200	A	jaromir-hybner.cz
31.192.65.225	PTR	225.65.net-connect.cz
31.192.66.68	A	server1.repress.cz
31.192.66.70	A	server.sts-technologie.cz
31.192.66.70	A	sts-technologie.cz
31.192.66.70	A	server.deltatechnologie.ru
31.192.66.71	PTR	mail.bartech.eu
31.192.66.72	PTR	www.bartech.eu
31.192.66.103	A	mail.asecure.cz
31.192.66.106	PTR	106.66.net-connect.cz
31.192.66.107	PTR	107.66.net-connect.cz
31.192.66.107	A	mail.estremia.cz
31.192.66.119	A	mail.bytovka.cz
31.192.66.119	A	firma.bytovka.cz
31.192.66.236	A	mail.naradilukovsky.cz
31.192.66.239	A	havoc.cz
31.192.66.242	PTR	242.66.net-connect.cz
31.192.66.242	A	pkchem.cz
31.192.66.242	A	pkchemsrv.pkchem.cz
31.192.67.69	A	mail.karotaz.cz
31.192.67.165	A	saxovts.cz
31.192.67.165	A	zimbra.f-net.cz
31.192.68.1	A+PTR	mail.asolo.cz
31.192.68.19	A	www.dkhodonin.cz
31.192.68.19	A	mail.dkhodonin.cz
31.192.68.19	A	dkhodonin.cz
31.192.68.38	A	hodonin.mildas.net
31.192.68.204	A	www.pkchem.cz
31.192.69.165	A	mail.mart.cz
31.192.69.165	A	mail.m-art.cz
31.192.69.195	PTR	195.69.net-connect.cz
31.192.69.227	PTR	227.69.net-connect.cz
31.192.70.6	A	mail.matmed.cz
31.192.70.69	A	mail.kmbeta.cz
31.192.70.207	A	fruitmarket.cz
31.192.70.219	A	fpvpilot.cz
31.192.70.226	PTR	226.70.net-connect.cz
31.192.70.226	A	imap.maxcorp.cz
31.192.70.228	A	www.nejedniko.cz
31.192.70.228	A	nejedniko.cz
31.192.70.241	A	*.ofoto.cz
31.192.71.18	A	mail.alnus.cz
31.192.71.18	A	server.alnus.cz
31.192.71.34	PTR	34.71.net-connect.cz
31.192.71.34	A	mail.zsstr.cz
31.192.71.98	PTR	98.71.net-connect.cz
31.192.71.98	A	mail1.gumex.cz
31.192.71.98	A	mail1.gumex.sk
31.192.71.147	A	optika.kanakcz.com
31.192.71.153	A	myapack.com
31.192.71.153	A	www.chemosvit.cz
31.192.71.153	A	www.davas.com
31.192.71.195	A	argo.vinova.cz
31.192.72.2	A+PTR	bb-ecr1.vmr.net-connect.cz
31.192.72.2	A	im.net-connect.cz
31.192.72.2	A	office.net-connect.cz
31.192.72.13	A	dns.net-connect.cz
31.192.72.252	A	mail.kronsk.sk
31.192.72.252	A	mail2.kronsk.sk
31.192.76.150	A	mail.radiojih.cz
31.192.77.146	A	imap.asalonta.cz
31.192.77.146	A	imap.maxreklama.cz
31.192.78.140	A	pop3.vak-hod.cz
31.192.80.92	A	92.druzr.cust-nat.net-connect.cz
31.192.84.3	PTR	3.84.net-connect.cz
31.192.92.2	A	im.net-connect.cz
31.192.92.2	A	office.net-connect.cz
31.192.92.13	A	antonie.net-connect.cz
31.192.92.13	A	ns2.net-connect.cz
31.192.92.18	A	im.net-connect.cz
31.192.92.18	A	office.net-connect.cz
31.192.95.1	PTR	1.95.broadband.blue.sk
31.192.95.2	A+PTR	adsl.witto.sk
31.192.95.110	A	adsl.panflex.sk
31.192.95.131	PTR	131.95.broadband.blue.sk
31.192.95.131	A	mail.arcaconsulting.cz
31.192.95.131	A	mail.mikic.sk
31.192.95.253	A	ns2.blue.sk
31.192.95.254	A	ns1.blue.sk