Robtex

Up: 81.0.226.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.0.227.0/25
Down right: 81.0.227.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.0.227.0	PTR	net-81-0-227-0.casablanca.cz
81.0.227.5	PTR	assigned-81-0-227-5.casablanca.cz
81.0.227.6	PTR	sosasout.casablanca.cz
81.0.227.12	PTR	assigned-81-0-227-12.casablanca.cz
81.0.227.14	PTR	mail.singaporeair.cz
81.0.227.25	A+PTR	eserver.protrade.cz
81.0.227.25	A	projgs-gw.casablanca.cz
81.0.227.33	A+PTR	n25in.e4you.cz
81.0.227.34	A	narodni-vagon.e4you.cz
81.0.227.35	A	narodni-m2.e4you.cz
81.0.227.36	A	narodni-g1.e4you.cz
81.0.227.37	A	narodni-g2.e4you.cz
81.0.227.38	A+PTR	narodni-ap.e4you.cz
81.0.227.39	A	narodni-jt.e4you.cz
81.0.227.39	A	posta.jamcasting.cz
81.0.227.40	A	narodni-metro.e4you.cz
81.0.227.50	A	mail.oskarplast.cz
81.0.227.58	A+PTR	mail.spark-rockmagazine.cz
81.0.227.58	A	mail.rockandpop.cz
81.0.227.81	A	sbs.oresi.cz
81.0.227.84	A	mail.oresi.eu
81.0.227.90	A	lamonne.casablanca.cz
81.0.227.96	PTR	net-81-0-227-96.casablanca.cz
81.0.227.97	A	mailrelay.adventura.cz
81.0.227.98	PTR	adventura.biz
81.0.227.98	PTR	adventura.cz
81.0.227.98	PTR	cestach.cz
81.0.227.100	PTR	aconcagua.cz
81.0.227.100	A+PTR	www.aconcagua.cz
81.0.227.100	A	*.aconcagua.cz
81.0.227.101	A+PTR	kilimanjaro.cz
81.0.227.101	A+PTR	www.kilimanjaro.cz
81.0.227.101	A	*.kilimanjaro.cz
81.0.227.102	PTR	rafty.cz
81.0.227.102	PTR	rafty.net
81.0.227.102	PTR	www.rafty.cz
81.0.227.103	A+PTR	ekvador.cz
81.0.227.103	A+PTR	www.ekvador.cz
81.0.227.103	A	mail.ekvador.cz
81.0.227.104	A+PTR	chile.cz
81.0.227.104	A+PTR	www.chile.cz
81.0.227.104	A	mail.chile.cz
81.0.227.105	A+PTR	patagonie.cz
81.0.227.105	A+PTR	www.patagonie.cz
81.0.227.105	A	mail.patagonie.cz
81.0.227.111	PTR	bikeholidays.eu
81.0.227.111	PTR	www.bikeholidays.eu
81.0.227.112	A+PTR	afrika-tour.com
81.0.227.112	A+PTR	afrika-tour.cz
81.0.227.112	A+PTR	www.afrika-tour.com
81.0.227.113	PTR	assigned-81-0-227-113.casablanca.cz
81.0.227.113	A	*.rafty.cz
81.0.227.113	A	mail.rafty.cz
81.0.227.115	A	clubadventuraos.org
81.0.227.116	PTR	pragia.cz
81.0.227.116	PTR	www.pragia.cz
81.0.227.117	A+PTR	kerkyra.cz
81.0.227.117	A+PTR	www.kerkyra.cz
81.0.227.117	A	*.kerkyra.cz
81.0.227.124	A	exchange.adventura.cz
81.0.227.124	A	fantom.adventura.cz
81.0.227.125	PTR	mail.adventura.biz
81.0.227.125	PTR	mail.adventura-travel.com
81.0.227.125	PTR	mail.afrika-tour.com
81.0.227.137	A+PTR	kobold.gremlin.cz
81.0.227.137	A	fenix.gremlin.cz
81.0.227.138	A	mantikora.gremlin.cz
81.0.227.139	A+PTR	kraken.gremlin.cz
81.0.227.142	PTR	fenix.gremlin.cz
81.0.227.145	A+PTR	altron.casablanca.cz
81.0.227.153	A+PTR	sw0.erudio.cz
81.0.227.153	A	hwobchod.erudio.cz
81.0.227.154	PTR	sw1.erudio.cz
81.0.227.155	A	sw2.erudio.cz
81.0.227.156	A	sw3.erudio.cz
81.0.227.157	A+PTR	sw4.erudio.cz
81.0.227.158	PTR	cert.erudio.cz
81.0.227.161	A	em13ex1.emris.cz
81.0.227.162	PTR	assigned-81-0-227-162.casablanca.cz
81.0.227.162	A	aww-brno.ip-anywhere.net
81.0.227.164	PTR	assigned-81-0-227-164.casablanca.cz
81.0.227.164	A	emris.cz
81.0.227.164	A	www.emris.cz
81.0.227.166	A+PTR	emantg.emris.cz
81.0.227.170	A	mail.emris.cz
81.0.227.172	PTR	assigned-81-0-227-172.casablanca.cz
81.0.227.178	A+PTR	pdc.resiz.cz
81.0.227.182	PTR	assigned-81-0-227-182.casablanca.cz
81.0.227.182	A	pdc.utp.cz
81.0.227.186	A	mx.mzda.eu
81.0.227.193	PTR	assigned-81-0-227-193.casablanca.cz
81.0.227.201	A+PTR	hanys-pri-node1.cust.casablanca.cz
81.0.227.214	A	gw-rembrand.casablanca.cz
81.0.227.227	A	watchdog.158.cz
81.0.227.233	PTR	unassigned-81-0-227-233.casablanca.cz
81.0.227.249	A	gw-procentrum.casablanca.cz
81.0.227.250	PTR	halfen-deha.cust.casablanca.cz
81.0.227.250	A	procentrum.casablanca.cz
81.0.227.253	A	gw-cias.casablanca.cz
81.0.227.254	A	cias.casablanca.cz
81.0.227.255	PTR	bcast-81-0-227-255.casablanca.cz