Robtex

Up: 212.4.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 212.4.144.0/21
Down right: 212.4.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.4.144.2	PTR	server.fcom.cz
212.4.144.2	A	212-4-144-144.fcom.cz
212.4.144.2	A	212-4-144-44.fcom.cz
212.4.144.247	A	sheo.cz
212.4.144.249	A	bure.cz
212.4.148.79	PTR	212-4-148-79.cust.selfnet.cz
212.4.148.79	A	kubul.us
212.4.150.151	A	filipvaverka.net
212.4.150.236	PTR	deer.kovozamecnictvi.cz
212.4.151.85	A+PTR	mail.mkgym.cz
212.4.152.27	A	tygr5.salamouna.cz
212.4.152.27	A	*.salamouna.net
212.4.152.27	A	*.salamouna.cz
212.4.152.30	PTR	tygr6.salamouna.cz
212.4.152.82	A+PTR	zeus.jednotamk.cz
212.4.152.83	A+PTR	forest.jednotamk.cz
212.4.152.84	A	ares.jednotamk.cz
212.4.152.86	A	coop.jednotamk.cz
212.4.152.195	PTR	212-4-152-195-servers.bitmng.it
212.4.152.195	A	mail.paser-tec.com
212.4.152.195	A	mail.canberry.it
212.4.152.229	A	platform.origin.avast.com
212.4.152.235	A	israel.avg.com
212.4.152.239	A	ishare.avg.com
212.4.152.248	A	platformdashboard.origin.avg.com
212.4.153.70	A	sectbrupd.avg.com
212.4.153.73	A	reliablenews.com
212.4.153.133	A	myfire.cz
212.4.153.133	A	partner4it.cz
212.4.153.133	A	www.gtw.cz
212.4.153.139	A	partner4it.cz
212.4.153.139	A	www.gtw.cz
212.4.153.139	A	server.gtw.cz
212.4.153.153	A	mx01.justicia.org
212.4.153.153	A	mail.xxxmail.eu
212.4.153.153	A	mail.steindorfer.net
212.4.153.164	PTR	fe-self001.nos-avg.cz
212.4.153.164	A	s01.nos-avg.cz
212.4.153.165	A+PTR	fe-self002.nos-avg.cz
212.4.153.165	A	s02.nos-avg.cz
212.4.153.166	PTR	fe-self003.nos-avg.cz
212.4.153.166	A	s03.nos-avg.cz
212.4.153.167	PTR	fe-self004.nos-avg.cz
212.4.153.178	A	mail.bitmng.com
212.4.153.179	A	mail.nrbc.it
212.4.153.181	A	medlac.it
212.4.153.195	A	povleceni-brno.cz
212.4.153.195	A	textil-brno.cz
212.4.153.195	A	bytovy-textil.net
212.4.153.197	A+PTR	vp407.vasprostor.cz
212.4.153.208	A	opengame.cz
212.4.153.208	A	brnoff.cz
212.4.153.210	PTR	vp408.vasprostor.cz
212.4.153.210	A	mail.vasprostor.cz
212.4.153.210	A	vasemail.vasprostor.cz
212.4.153.225	A	afl.cz
212.4.153.226	A	kempstebnice.cz
212.4.153.226	A	vpz.cz
212.4.153.226	A	gamamodel.eu
212.4.153.241	A	slb.cz
212.4.153.241	A	slb.eu
212.4.156.3	A	martin.salamouna.net
212.4.158.8	A	ns2.is4u.cz
212.4.158.17	A	fresh2go.eu
212.4.158.17	A	sportplanet.cz
212.4.158.17	A	allmaxnutrition.cz
212.4.158.18	A	vranovskeleto.cz
212.4.158.48	PTR	ip158-48.silinet.cz
212.4.158.48	A	cpmprague.cz
212.4.158.48	A	azhandyman.cz
212.4.158.49	PTR	ip158-49.silinet.cz
212.4.158.101	A	lesy-as.cz
212.4.158.101	A	t-c-m.cz
212.4.158.101	A	vincoop.cz