Robtex

Up: 185.52.172.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 185.52.172.0/25
Down right: 185.52.172.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.52.172.14	PTR	u185-52-172-14.ispalliance.cz
185.52.172.83	PTR	web.compunet.cz
185.52.172.83	A	sirwisa.net
185.52.172.83	A	logmanager.cz
185.52.172.84	A+PTR	kerio.compunet.cz
185.52.172.85	PTR	core2.raketovazakladna.cz
185.52.172.85	A	studiob53.cz
185.52.172.85	A	czech-wrestling.cz
185.52.172.86	A+PTR	ftp.knapovsky.org
185.52.172.86	A	www.knapovsky.org
185.52.172.88	PTR	core.fotopix.cz
185.52.172.88	A	abelsonagency.com
185.52.172.88	A	*.ehm.cz
185.52.172.89	PTR	core.raketovazakladna.cz
185.52.172.89	A	czech-wrestling.cz
185.52.172.89	A	mail.radocom.cz
185.52.172.170	A	gw.kvetakov.net
185.52.172.236	PTR	cache.google.com
185.52.172.236	A	r1.sn-bg52x-2gbl.googlevideo.com
185.52.172.236	A	r1---sn-bg52x-2gbl.googlevideo.com
185.52.172.237	PTR	cache.google.com
185.52.172.237	A	r2---sn-bg52x-2gbl.googlevideo.com
185.52.172.237	A	r2.sn-bg52x-2gbl.gvt1.com
185.52.172.238	PTR	cache.google.com
185.52.172.238	A	r3.sn-bg52x-2gbl.gvt1.com
185.52.172.238	A	r3.sn-bg52x-2gbl.googlevideo.com
185.52.172.239	PTR	cache.google.com
185.52.172.239	A	r4.sn-bg52x-2gbl.googlevideo.com
185.52.172.240	PTR	cache.google.com
185.52.172.240	A	r5.sn-bg52x-2gbl.googlevideo.com
185.52.172.241	PTR	cache.google.com
185.52.172.241	A	r6.sn-bg52x-2gbl.googlevideo.com