Robtex

Up: 78.41.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 78.41.16.0/22
Down right: 78.41.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
78.41.18.67	PTR	pater2.online-services.cz
78.41.18.67	A	quash.cz
78.41.18.67	A	sk-kesl-ryu.cz
78.41.18.75	A+PTR	email.mrna.cz
78.41.18.75	A	email2.mrna.cz
78.41.18.77	A	mirek.flirt4free.cz
78.41.18.77	A	mail.flirt4free.cz
78.41.18.190	PTR	mail.aladin.cz
78.41.19.2	A+PTR	ns1.newtel.cz
78.41.19.3	A+PTR	ns2.newtel.cz
78.41.19.7	PTR	ns2.netlancers.cz
78.41.19.7	A	newtelekom.cz
78.41.19.9	PTR	mx1.newtel.cz
78.41.19.9	A	ms.newtel.cz
78.41.19.35	A+PTR	rt.newtel.cz
78.41.19.56	PTR	www.pracovni.cz
78.41.19.57	A+PTR	ispconfig.newtel.cz
78.41.19.57	A	newtel.cz
78.41.19.57	A	www.newtelekom.cz
78.41.19.80	A	voip.newtel.cz
78.41.19.131	A+PTR	faktury.newtel.cz
78.41.19.131	A	www.newtelekom.cz
78.41.19.131	A	zakaznik.newtelekom.cz
78.41.19.150	A	web.newtel.cz
78.41.19.226	A+PTR	remote.atlancom.cz
78.41.19.228	PTR	ns1.atlancom.cz
78.41.19.228	A	smtp.atlancom.cz
78.41.19.228	A	chatovadlo.cz
78.41.19.229	PTR	mail.atlancom.cz
78.41.19.230	PTR	ns2.atlancom.cz
78.41.19.232	A+PTR	smtp-ssl.atlancom.cz
78.41.19.239	A+PTR	mail.bertolino.cz
78.41.19.240	PTR	adela.atlancom.cz
78.41.19.240	A	puz.cz
78.41.19.240	A	nouhau.cz
78.41.19.241	PTR	241.atlancom.cz
78.41.19.242	PTR	mx.atlancom.cz
78.41.19.248	A+PTR	mail.hudak.cz
78.41.19.248	A	mail.rally-foto.cz
78.41.20.11	A	mail.citroen-plzen.cz
78.41.21.2	A	mail.ligna.cz
78.41.21.3	PTR	web.flirt4free.cz
78.41.21.3	A	*.eurolive.cz
78.41.21.3	A	*.znet.cz
78.41.21.11	PTR	gw.trigema.cz
78.41.21.35	A+PTR	ex.pram.cz
78.41.21.35	A	ex.pram.sk
78.41.21.70	PTR	exchnet.exchange.cz
78.41.21.97	PTR	fw1-fw2.exchange.cz
78.41.21.179	PTR	mail.inova.cz
78.41.21.225	PTR	mail.carling.cz
78.41.21.225	A	mail.profikol.cz
78.41.21.232	PTR	server7.carling.cz
78.41.21.254	A	office.uni-global.eu
78.41.22.10	PTR	fs.fscodes.cz
78.41.22.34	A	mail.avia-energo.cz
78.41.22.34	A	mail.avia-energo.com
78.41.22.34	A	mail.avia-as.cz
78.41.22.67	A+PTR	dns1.idg.cz
78.41.22.68	A+PTR	dns2.idg.cz
78.41.22.70	A+PTR	mail.idg.cz
78.41.22.71	A	webmail.idg.cz
78.41.22.77	A	online.idg.cz
78.41.22.78	A	typologie.cz
78.41.22.78	A	smuts.cz
78.41.22.84	PTR	1.mailservers.name
78.41.22.85	A+PTR	mail2.cheops.cz
78.41.22.86	A	mail.visualimpact.cz
78.41.22.86	A	mail3.cheops.cz
78.41.22.87	A+PTR	chmail.cheops.cz
78.41.22.88	A	smtp.idg.cz
78.41.22.89	A	ip1.cheops.cz
78.41.22.91	PTR	mail.cheops.cz
78.41.22.92	A+PTR	fw.recoc.cz
78.41.22.92	A	fw1.recoc.cz
78.41.22.130	A+PTR	vp.ngprague.cz
78.41.22.130	A	mail.ngprague.cz
78.41.22.131	A	remote.fondkinematografie.cz
78.41.22.138	A	server02.frances.cz
78.41.22.179	A+PTR	mail1.pinf.cz
78.41.22.180	A+PTR	mail.pinf.cz
78.41.22.180	A	pinf.cz
78.41.22.190	PTR	mail.pis.cz
78.41.22.190	A	gw.praha-cz.info
78.41.22.202	PTR	ecp-cz.cz
78.41.23.19	PTR	mail2.akfs.cz
78.41.23.62	PTR	mail.czstyle.cz
78.41.23.70	A	virthost.eu
78.41.23.92	PTR	mail.abbas.cz
78.41.23.162	PTR	mail.ligna.cz
78.41.23.162	A	ligna.cz
78.41.23.162	A	www.ligna.cz
78.41.23.163	A	ligna2.ligna.cz
78.41.23.164	PTR	ligna3.ligna.cz
78.41.23.166	A	ligna.cz
78.41.23.226	PTR	mail.alfix.cz
78.41.23.226	A	mail.alfix.sk
78.41.23.242	PTR	sbs2000.pharservice.cz
78.41.23.243	PTR	trigema.cz