Robtex

Up: 217.144.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 217.144.80.0/21
Down right: 217.144.88.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.144.80.0	PTR	network-217-144-80.reactive-networks.net
217.144.80.64	PTR	network.reactive-networks.net
217.144.80.80	PTR	ns0.reactiveuk.net
217.144.80.85	A	mail.reactive-networks.net
217.144.80.85	A	mailbox.micronet.co.uk
217.144.80.90	A	ns1.r0cks.net
217.144.80.90	A	ns1.reactive-networks.net
217.144.80.100	A	zulu.reactive-networks.net
217.144.80.102	A	mailbox.reactive-networks.net
217.144.80.160	PTR	217-144-80-160.reactive-networks.net
217.144.82.0	PTR	network-217-144-82.reactive-networks.net
217.144.82.2	A	piermorrocco.net
217.144.82.2	A	patooie.com
217.144.82.2	A	5am.net
217.144.82.18	A	denverestimating.com
217.144.82.21	A	vspl.reactive-networks.net
217.144.82.23	A	fastrewind.com
217.144.82.23	A	70s.fast-rewind.com
217.144.82.42	A	voipfree.co.uk
217.144.82.92	A	recellnet.org
217.144.82.92	A	metalexis.com
217.144.82.92	A	templetranslations.eu
217.144.82.96	A	greenitequipment.com
217.144.82.99	PTR	www7.1tc.co.uk
217.144.82.100	A	alchemyuk.com
217.144.82.100	A	chiswick500.com
217.144.82.100	A	centre500.com
217.144.83.2	A	*.cogizat.com
217.144.83.2	A	jadara.org.uk
217.144.83.2	A	www.jadara.org
217.144.83.3	PTR	jabber.org.uk
217.144.83.20	A	www.rst38.org.uk
217.144.83.20	A	rst38.org.uk
217.144.83.20	A	fotography.co.uk
217.144.83.83	A+PTR	bubble.etitsup.com
217.144.83.83	A	*.etitsup.com
217.144.90.75	A	mpumalanga.reactive-networks.net
217.144.90.90	PTR	ns1.reactive-networks.net
217.144.90.90	A	ns2.reactive-networks.net
217.144.90.255	PTR	broadcast-217-144-90.reactive-networks.net
217.144.91.51	PTR	cust51-dsl217-144-91.idnet.net
217.144.91.51	A	host5.jimnet-backbone.co.uk
217.144.91.51	A	directbackup.net
217.144.91.53	PTR	cust53-dsl217-144-91.idnet.net
217.144.91.53	A	jimnet-backbone.co.uk
217.144.91.195	PTR	cust195-dsl217-144-91.idnet.net
217.144.91.195	A	happynrich.group
217.144.91.195	A	izolex.sk
217.144.91.196	PTR	cust196-dsl217-144-91.idnet.net
217.144.91.196	A	happynrich.cz
217.144.92.18	A+PTR	cust18-dsl217-144-92.idnet.net
217.144.92.20	A	mailgate.vspl.co.uk
217.144.92.25	A	cust25-dsl217-144-92.idnet.net
217.144.92.26	A	mail.baileygomm.co.uk
217.144.92.33	PTR	atm0.cp-hamble.reactive-networks.net
217.144.92.33	A	mx2.labrums.co.uk
217.144.92.37	A	vehentis.com
217.144.92.37	A	ixion.org.uk
217.144.92.37	A	vehentis.net
217.144.92.76	A	cust76-dsl217-144-92.idnet.net
217.144.92.100	A	cust100-dsl217-144-92.idnet.net
217.144.92.102	A	cust102-dsl217-144-92.idnet.net
217.144.92.104	A	cust104-dsl217-144-92.idnet.net
217.144.92.107	A	cust107-dsl217-144-92.idnet.net
217.144.92.115	A+PTR	cust115-dsl217-144-92.idnet.net
217.144.92.119	A	cust119-dsl217-144-92.idnet.net
217.144.92.125	A	cust125-dsl217-144-92.idnet.net
217.144.92.129	A+PTR	cust129-dsl217-144-92.idnet.net
217.144.92.144	A+PTR	cust144-dsl217-144-92.idnet.net
217.144.92.152	A	cust152-dsl217-144-92.idnet.net
217.144.92.156	A	cust156-dsl217-144-92.idnet.net
217.144.92.172	A	cust172-dsl217-144-92.idnet.net
217.144.92.176	A+PTR	cust176-dsl217-144-92.idnet.net
217.144.92.182	A	cust182-dsl217-144-92.idnet.net
217.144.92.188	A	cust188-dsl217-144-92.idnet.net
217.144.92.200	A	cust200-dsl217-144-92.idnet.net
217.144.92.201	A	cust201-dsl217-144-92.idnet.net
217.144.92.211	A+PTR	cust211-dsl217-144-92.idnet.net
217.144.92.222	A	cust222-dsl217-144-92.idnet.net
217.144.92.237	A	cust237-dsl217-144-92.idnet.net
217.144.93.40	A	firemansam.reactive-networks.net
217.144.93.111	PTR	217-144-93-111.reactive-networks.net
217.144.93.202	A	vpn.coffeepoint.co.uk