Robtex

Up: 81.0.228.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 81.0.228.128/26
Down right: 81.0.228.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.0.228.129	PTR	rumcajz.pcv.cz
81.0.228.129	A	c.ns.zlata-hokejka.cz
81.0.228.129	A	c.ns.ozzak.cz
81.0.228.130	PTR	unassigned-81-0-230-0-130.casablanca.cz
81.0.228.130	A	ns1.markiza.sk
81.0.228.130	A	a.mx.superportal.cz
81.0.228.132	A	protagoras.sofist.cz
81.0.228.134	PTR	unassigned-81-0-230-0-134.casablanca.cz
81.0.228.147	PTR	winkelbauer.dacc.cz
81.0.228.147	A	server.cachrov.cz
81.0.228.147	A	winkelbauer.kyncl.org
81.0.228.151	PTR	bohdal.dacc.cz
81.0.228.151	A	www.cd2002.cz
81.0.228.151	A	apartmany-bk.cz
81.0.228.157	PTR	www.dcc.is
81.0.228.157	A	www.dempseyclark.eu
81.0.228.157	A	dempseyclark.cz
81.0.228.161	PTR	platon.sofist.cz
81.0.228.161	A	www.sofist.cz
81.0.228.161	A	bh90210.serial.cz
81.0.228.162	A+PTR	sokrates.sofist.cz
81.0.228.163	A+PTR	aristoteles.sofist.cz
81.0.228.164	A+PTR	epikuros.sofist.cz
81.0.228.165	PTR	mira.sofist.cz
81.0.228.165	A	diveservis.cz
81.0.228.165	A	mail.postele-pokoje.cz
81.0.228.166	A	ns.misu.sk
81.0.228.166	A	misu.sofist.cz
81.0.228.167	A	secure.sofist.cz
81.0.228.174	A	asko-butor.hu
81.0.228.176	PTR	janosik.pcv.cz
81.0.228.176	A	rumcajz.cava.cz
81.0.228.176	A	root.pcv.cz
81.0.228.177	A+PTR	demokritos.sofist.cz
81.0.228.177	A	sofist.cz
81.0.228.181	PTR	janosik04.pcv.cz
81.0.228.182	PTR	www.eser.cz
81.0.228.183	A+PTR	www.iks-soft.cz
81.0.228.183	A	iks-soft.cz
81.0.228.183	A	rozhledna.eu
81.0.228.193	PTR	mail.summitmedia.com
81.0.228.219	PTR	assigned-81-0-228-219.casablanca.cz
81.0.228.225	A	jonas.casablanca.cz
81.0.228.227	PTR	unassigned-81.0.228.227.casablanca.cz
81.0.228.242	A	template.casablanca.cz
81.0.228.243	PTR	test.casablanca.cz
81.0.228.244	A	kohy.casablanca.cz