Robtex

Up: 87.236.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 87.236.193.0/25
Down right: 87.236.193.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.236.193.20	PTR	vserver1.coolhousing.net
87.236.193.21	PTR	server1.skveleceny.cz
87.236.193.21	A	www.skveleceny.sk
87.236.193.21	A	skveleceny.sk
87.236.193.22	A+PTR	server2.skveleceny.cz
87.236.193.24	A+PTR	server.fastemailing.cz
87.236.193.24	A	fastemailing.cz
87.236.193.24	A	fast-emailing.cz
87.236.193.28	A	smtp4.fastemailing.cz
87.236.193.29	A	ntop.hosting90.cz
87.236.193.36	PTR	mail.hexaweb.cz
87.236.193.44	A	maresova.com
87.236.193.45	PTR	datavsuchu.cz
87.236.193.46	PTR	server.tengler.cz
87.236.193.46	A	drezura.cz
87.236.193.50	PTR	unassigned-87.236.193.50.coolhousing.net
87.236.193.50	A	posta.kinet.cz
87.236.193.50	A	mail2.kinet.cz
87.236.193.51	PTR	unassigned-87.236.193.51.coolhousing.net
87.236.193.51	A	webhost01.kinet.cz
87.236.193.51	A	webhost.kinet.cz
87.236.193.52	A	webhost02.kinet.cz
87.236.193.53	PTR	unassigned-87.236.193.53.coolhousing.net
87.236.193.53	A	nwl.kinet.cz
87.236.193.54	A+PTR	zimbra.kinet.cz
87.236.193.55	PTR	mail.kinet.cz
87.236.193.56	PTR	proxy.kinet.cz
87.236.193.56	A	netmediapro.cz
87.236.193.56	A	andres.cz
87.236.193.57	PTR	mailer.kinet.cz
87.236.193.57	A	mail.aedl.cz
87.236.193.57	A	kerio.kinet.cz
87.236.193.81	A	testing4.praguebest.cz
87.236.193.100	PTR	mapio.cz
87.236.193.100	A	www.mapio.net
87.236.193.100	A	blueskyfeed.com
87.236.193.105	PTR	unassigned-87.236.193.105.coolhousing.net
87.236.193.105	A	server2.wlist.cz
87.236.193.106	A	forum.autoforum.cz
87.236.193.111	PTR	unassigned-87.236.193.111.coolhousing.net
87.236.193.111	A	dachshaus.cz
87.236.193.111	A	a500.cz
87.236.193.154	PTR	dch-362.coolhousing.net
87.236.193.158	PTR	sip.158.cz
87.236.193.160	PTR	zen.mitm.cz
87.236.193.162	PTR	yin.mitm.cz
87.236.193.182	PTR	s1.zserver.cz
87.236.193.182	A	mail.toors.ru
87.236.193.182	A	mail.toors.es
87.236.193.184	PTR	kiosk2.hosting4u.cz
87.236.193.193	PTR	unassigned-87.236.193.193.coolhousing.net
87.236.193.193	A	smtp.snowboardteam.eu
87.236.193.193	A	linuxiso.cz
87.236.193.200	PTR	beta.cargarant.cz
87.236.193.200	A	mail.cargarant.ru
87.236.193.200	A	mail2.cargarant.cz
87.236.193.204	PTR	unassigned-87.236.193.204.coolhousing.net
87.236.193.204	A	cargarant.ru
87.236.193.205	A	cargarant.eu
87.236.193.205	A	cargarant.sk
87.236.193.206	A	cargarant.net
87.236.193.235	PTR	backup-mx.hosting90.cz
87.236.193.236	PTR	archiv2.hosting90.cz
87.236.193.237	PTR	h90-antispam-sql1.hosting90.cz
87.236.193.241	PTR	milhouse.onebit.org
87.236.193.241	A	mail.nutten-game.net
87.236.193.246	PTR	unassigned-87.236.193.246.coolhousing.net
87.236.193.246	A	compexshop.eu
87.236.193.246	A	compexshop.net
87.236.193.247	A+PTR	mail.czechstyle.com