Robtex

Up: 81.187.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.187.36.0/23
Down right: 81.187.38.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.187.36.2	A	base-aaisp.mxtelecom.com
81.187.36.2	A	base-mx-aaisp.openmarket.com
81.187.36.4	A	chinook-aaisp.mxtelecom.com
81.187.36.4	A	chinook-aaisp.openmarket.com
81.187.36.89	PTR	81.187.36.89
81.187.36.90	PTR	lomaxesdc.lomaxes.me.uk
81.187.36.90	PTR	lomaxesex.lomaxes.me.uk
81.187.36.90	A	quakersineurope.org
81.187.36.93	PTR	81.187.36.93
81.187.36.108	PTR	81.187.36.108
81.187.36.108	A	exchange.elsravenhead.co.uk
81.187.36.108	A	exchange.eurolabsupplies.co.uk
81.187.36.150	A	sysinst.org
81.187.36.150	A	sysinst.info
81.187.36.202	A+PTR	plone.reflec.co.uk
81.187.36.202	A	reflec.com
81.187.36.202	A	reflec.co.uk
81.187.36.203	PTR	203.36.187.81.in-addr.arpa
81.187.37.0	A+PTR	0.37.187.81.in-addr.arpa
81.187.37.34	A	evanshomepage.com
81.187.37.34	A	hal.evanshomepage.com
81.187.37.34	A	mail.evanshomepage.com
81.187.37.48	A+PTR	48.37.187.81.in-addr.arpa
81.187.37.52	A	natch.scrumpy.me.uk
81.187.37.63	A	63.37.187.81.in-addr.arpa
81.187.37.67	A	garibaldi.zhadum.org.uk
81.187.37.98	A+PTR	mailgate2.netik.com
81.187.37.98	A	98.37.187.81.in-addr.arpa
81.187.37.130	A	creativemediacollege.org
81.187.37.130	A	desktop.shoalnet.org
81.187.37.130	A	digitalpreceptors.com
81.187.37.131	PTR	131.37.187.81.in-addr.arpa
81.187.37.140	A	currentlyunderconstruction.com
81.187.37.162	A	gorge.org
81.187.37.171	A+PTR	mail.chrysostomides.co.uk
81.187.37.171	A	chrysostomides.co.uk
81.187.37.200	A	200.37.187.81.in-addr.arpa
81.187.37.225	A	natch.scrumpy.me.uk
81.187.37.235	A	old-shed.scrumpy.me.uk
81.187.37.235	A	235.37.187.81.in-addr.arpa
81.187.38.0	A+PTR	0.38.187.81.in-addr.arpa
81.187.38.142	PTR	142.38.187.81.in-addr.arpa
81.187.38.152	A	152.38.187.81.in-addr.arpa
81.187.38.195	PTR	s1.elseif.co.uk
81.187.38.195	A	mail42.wrighton.net
81.187.38.195	A	elseif.co.uk
81.187.39.0	PTR	81.187.39.0
81.187.39.0	A	0.39.187.81.in-addr.arpa
81.187.39.34	PTR	81.187.39.34
81.187.39.34	A	34.39.187.81.in-addr.arpa
81.187.39.70	A	router.rabson.org