Robtex

Up: 194.61.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 194.61.48.0/23
Down right: 194.61.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
194.61.48.22	A+PTR	remote.odes.cz
194.61.48.22	A	mail2.odes.cz
194.61.48.29	PTR	remote.eminger.cz
194.61.48.29	A	mail.eminger.cz
194.61.48.242	A+PTR	ns1.mdscz.com
194.61.48.243	A	mail2.mdscz.com
194.61.48.250	A	mail2.mdscz.com
194.61.48.251	A	gw.mdscz.com
194.61.49.4	A	pc421.scotsman.com
194.61.49.4	A	ns3.mdscz.com
194.61.49.70	A	server.pictor-hk.cz
194.61.49.70	A	pictor-hk.cz
194.61.49.71	A	mail1.scotsman.com
194.61.49.111	A	mail.prodirect.cz
194.61.49.113	A	mail.ekgfoto.cz
194.61.50.4	A	mail1.scanid.ru
194.61.50.4	A	mail.openntf.ru
194.61.50.4	A	openntf.ru
194.61.50.6	PTR	mail.samelogic.ru
194.61.50.6	A	mail2.samelogic.ru
194.61.50.7	PTR	mail2.samelogic.ru
194.61.50.8	A	mail2.samelogic.ru
194.61.50.11	A+PTR	hosting.kallen.cz
194.61.50.11	A	www.pictor-hk.cz
194.61.50.11	A	kallen.cz
194.61.50.12	A+PTR	asg.kallen.cz
194.61.50.12	A	mail.kallen.cz
194.61.50.12	A	mail.jaromer.net
194.61.50.21	PTR	sprava.rex-jaromer.cz
194.61.50.243	A	stylsoft.cz
194.61.50.245	A+PTR	email.stylsoft.cz
194.61.50.245	A	dbkglass.eu
194.61.50.245	A	jaromeronline.cz
194.61.50.250	A+PTR	ns4.mdscz.com
194.61.50.250	A	ns2.mdscz.com
194.61.50.251	A+PTR	nas.mdscz.com
194.61.50.252	A+PTR	smtp2.mdscz.com
194.61.50.253	A+PTR	metronet.mdscz.com
194.61.50.253	A	mdscz.com
194.61.50.253	A	www.mdscz.com
194.61.50.254	PTR	admin.stylsoft.cz
194.61.50.254	A	stylsoft.cz
194.61.50.254	A	dbkglass.eu
194.61.51.2	A+PTR	gw2.semonice.cz
194.61.51.2	A	srvpis.semonice.cz
194.61.51.82	A+PTR	atol.zsostrov.cz
194.61.51.170	A+PTR	fw.prost.cz
194.61.51.188	A	gw.semonice.cz
194.61.51.210	A+PTR	exchange.stylsoft.cz