Robtex

Up: 46.16.112.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 46.16.120.0/22
Down right: 46.16.124.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
46.16.120.2	A+PTR	ns2.marcomnet.cz
46.16.120.3	A+PTR	smtp.marcomnet.cz
46.16.120.6	A	mx.marcomnet.cz
46.16.120.9	PTR	web.marcomnet.cz
46.16.120.9	A	sumitomo.cz
46.16.120.9	A	marcom-eko.cz
46.16.120.10	PTR	a10.marcomnet.cz
46.16.120.10	A	marcom-eko.cz
46.16.120.10	A	nymburk.cz
46.16.120.25	A+PTR	mail.misan.cz
46.16.120.35	A	mail.tesyco.cz
46.16.120.51	A	mail20.herst.cz
46.16.120.53	A	f-ck.cz
46.16.120.53	A	mail.mental-collapse.cz
46.16.120.53	A	debtofmen.com
46.16.120.56	A+PTR	mail.postriziny.cz
46.16.120.58	PTR	a58.marcomnet.cz
46.16.120.65	A	mail.akluhan.cz
46.16.120.68	A	mail.dvur-seletice.cz
46.16.120.80	PTR	a80.marcomnet.cz
46.16.120.80	A	geodetk.cz
46.16.120.80	A	geodet-praha8.cz
46.16.120.94	A	mail.bramko.cz
46.16.120.94	A	mailserver.bramko.cz
46.16.120.100	A	apartments-hoffmeister.cz
46.16.120.100	A	a100.marcomnet.cz
46.16.120.100	A	diony.cz
46.16.120.111	A	a111.marcomnet.cz
46.16.120.118	A	a118.marcomnet.cz
46.16.120.167	A	a167.marcomnet.cz
46.16.120.180	A	a180.marcomnet.cz
46.16.120.225	A	a225.marcomnet.cz
46.16.120.245	A	hlas.marcomnet.cz
46.16.120.255	A	a255.marcomnet.cz
46.16.121.2	PTR	ns2.marcomnet.cz
46.16.121.3	PTR	smtp.marcomnet.cz
46.16.121.40	PTR	b40.marcomnet.cz
46.16.121.101	A	b101.marcomnet.cz
46.16.121.102	A	b102.marcomnet.cz
46.16.121.109	A	b109.marcomnet.cz
46.16.121.118	A	b118.marcomnet.cz
46.16.121.122	A	b122.marcomnet.cz
46.16.121.123	A	b123.marcomnet.cz
46.16.121.130	A+PTR	b130.marcomnet.cz
46.16.121.135	A	b135.marcomnet.cz
46.16.121.136	A+PTR	b136.marcomnet.cz
46.16.121.180	A	b180.marcomnet.cz
46.16.121.186	A	b186.marcomnet.cz
46.16.121.190	A	b190.marcomnet.cz
46.16.121.226	A+PTR	b226.marcomnet.cz
46.16.121.228	A	b228.marcomnet.cz
46.16.121.238	A	b238.marcomnet.cz
46.16.121.240	A	fw.redrock.cz
46.16.122.97	PTR	c97.marcomnet.cz
46.16.123.184	A	toall.cz