Robtex

Up: 178.23.208.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 178.23.216.0/22
Down right: 178.23.220.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
178.23.216.8	PTR	cust178232168.jhcomp.cz
178.23.216.9	A	vtipils.com
178.23.216.16	PTR	cust1782321616.jhcomp.cz
178.23.216.19	PTR	cust1782321619.jhcomp.cz
178.23.216.19	A	mail.sag.as
178.23.216.31	A	mail.rempelsmejkal.com
178.23.216.31	A	mail.subterplus.cz
178.23.216.31	A	mail.opravna-sada.cz
178.23.216.34	A	otin.jhgroup.cz
178.23.216.55	A	timeco.cz
178.23.216.57	A+PTR	zts.zts-jh.cz
178.23.216.61	A	mail.knihjh.cz
178.23.216.61	A	knih-jh.cz
178.23.216.62	A	mail2.knihjh.cz
178.23.216.66	A+PTR	ns2.jhcomp.cz
178.23.216.66	A	ns2.j-hradec.cz
178.23.216.72	PTR	cust1782321672.jhcomp.cz
178.23.216.80	PTR	cust1782321680.jhcomp.cz
178.23.216.80	A	mail.htw4y.org
178.23.216.80	A	mail.telerepair.org
178.23.216.81	PTR	cust1782321681.jhcomp.cz
178.23.216.118	A+PTR	agrola.agrola.cz
178.23.216.123	A	decentdesign.cz
178.23.216.123	A	fitenergy.cz
178.23.216.123	A	www.jhbus.cz
178.23.216.132	A	mail.dkopen.cz
178.23.216.134	A	zdravepohodlicko.cz
178.23.216.134	A	vlcetin.cz
178.23.216.134	A	server.data-soft.cz
178.23.216.136	A+PTR	gw.skolajh.cz
178.23.216.138	PTR	server.novaksoftware.cz
178.23.216.138	A	artitalia.eu
178.23.216.138	A	mail.mimiobchudek.cz
178.23.216.147	A	mail.szsjh.cz
178.23.216.154	A	jh.abrako.cz
178.23.216.155	PTR	cust17823216155.jhcomp.cz
178.23.216.155	A	dkopen.cz
178.23.216.157	A	szsjh.cz
178.23.216.158	A	mail.3zsjhradec.cz
178.23.216.175	A	gw.wayproject.cz
178.23.216.175	A	mx.wayproject.cz
178.23.216.176	PTR	box.wayproject.cz
178.23.216.176	A	*.wayproject.cz
178.23.216.176	A	progres-psv.cz
178.23.216.177	PTR	cust17823216177.jhcomp.cz
178.23.216.182	A	marjo.cz
178.23.216.190	A	server.arstav.cz
178.23.216.190	A	mail2.grandhotelcernyorel.cz
178.23.216.201	PTR	cust17823216201.jhcomp.cz
178.23.216.215	A	dastych.j-hradec.cz
178.23.216.216	A+PTR	mail.fruko.cz
178.23.216.216	A	jh.fruko.cz
178.23.216.216	A	imap.fruko.cz
178.23.216.217	PTR	mail.sedlacik.cz
178.23.216.220	A	mail.mrki.cz
178.23.216.220	A	mail.roboot.cz
178.23.216.220	A	ns1.roboot.cz
178.23.216.242	A	colourgroup.cz
178.23.216.242	A	christ-lacke.ru
178.23.216.242	A	colourgroup.biz
178.23.216.245	A	mail.subterplus.cz
178.23.217.27	A+PTR	skola.zsstraznn.cz
178.23.217.39	A	fintes-zebriky.cz
178.23.217.39	A	mail.fintes-zebriky.cz
178.23.217.39	A	fintes.cz
178.23.217.66	A+PTR	mail.plavskonet.cz
178.23.217.66	A	plavskonet.cz
178.23.217.103	A	obal.tecnocap.cz
178.23.217.131	A+PTR	agra.agradestna.cz
178.23.217.165	PTR	cust17823217165.jhcomp.cz
178.23.217.183	A	mail.jitka.cz
178.23.217.184	PTR	cust17823217184.jhcomp.cz
178.23.217.187	PTR	cust17823217187.jhcomp.cz
178.23.217.188	A	inwebio.net
178.23.217.188	A	mail.inwebio.net
178.23.217.198	A	mail.termoplast-cz.com
178.23.217.198	A	mail1.termoplast-cz.com
178.23.217.198	A	mail1.termoplast.cz
178.23.218.3	A+PTR	www3.jhcomp.cz
178.23.218.3	A	mail.j-hradec.cz
178.23.218.10	A	jhcvajgar.jhcomp.cz
178.23.218.10	A	mail2.jhcomp.cz
178.23.218.35	PTR	ns1.jhcomp.cz
178.23.218.35	A	dkopen.cz
178.23.218.35	A	ns1.j-hradec.cz
178.23.218.241	PTR	cust17823218241.jhcomp.cz
178.23.218.241	A	data-norms.eu
178.23.218.241	A	data-norms.com
178.23.218.253	A	mail.data-norms.cz
178.23.219.1	A+PTR	nat01.jhcomp.cz
178.23.219.2	A+PTR	nat02.jhcomp.cz
178.23.219.3	PTR	nat03.jhcomp.cz
178.23.219.6	A	nat06.jhcomp.cz
178.23.219.7	A	nat07.jhcomp.cz
178.23.219.8	A+PTR	nat08.jhcomp.cz
178.23.219.9	A	nat09.jhcomp.cz
178.23.219.10	A	nat10.jhcomp.cz
178.23.219.12	A	nat12.jhcomp.cz
178.23.219.35	PTR	cust1782321935.jhcomp.cz
178.23.219.35	A	mail-jh.elsynet.cz
178.23.219.36	PTR	cust1782321936.jhcomp.cz
178.23.219.36	A	mx3.elzy.cz
178.23.219.81	PTR	remote.zc.cz
178.23.219.82	PTR	remote.zc.cz
178.23.219.82	A	posta2.zc.cz
178.23.219.210	A	mail.slechtasro.cz
178.23.219.216	A+PTR	oac.sinvet.cz
178.23.219.216	A	zelery.cz
178.23.219.216	A	jhcargo.cz
178.23.220.5	A+PTR	nat105.jhcomp.cz
178.23.220.15	A+PTR	nat115.jhcomp.cz
178.23.220.19	PTR	nat119.jhcomp.cz
178.23.220.21	PTR	nat121.jhcomp.cz
178.23.220.22	PTR	nat122.jhcomp.cz
178.23.220.24	PTR	nat124.jhcomp.cz
178.23.220.136	A+PTR	simenia.cz
178.23.220.136	A	salondiamond.cz
178.23.220.164	A	gw.aaaanakladace.cz
178.23.220.199	A+PTR	jh.nsw.cz
178.23.220.199	A	nscg.cz
178.23.220.199	A	zdnv.cz
178.23.220.204	A	marjo.cz
178.23.220.204	A	mail.marjo.cz
178.23.220.206	PTR	telerepair.org
178.23.220.206	A	mail.telerepair.org
178.23.220.206	A	cztelerepair01.telerepair.org
178.23.220.217	PTR	cust17823220217.jhcomp.cz
178.23.220.226	PTR	roboot.cz
178.23.220.226	A	mail.mrki.cz
178.23.220.226	A	mail.roboot.cz
178.23.221.98	PTR	cust1782322198.jhcomp.cz
178.23.221.98	A	szsjh.cz
178.23.221.98	A	*.szsjh.cz
178.23.221.228	PTR	cust17823221228.jhcomp.cz
178.23.221.228	A	pluhuvzdar.cz