Robtex

Up: 80.84.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 80.84.64.0/22
Down right: 80.84.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.84.64.10	A	sz.uklinux.net
80.84.64.12	A+PTR	s2.uklinux.net
80.84.64.13	A+PTR	s3.uklinux.net
80.84.64.14	A	s14.uklinux.net
80.84.64.19	A+PTR	s9.uklinux.net
80.84.64.20	A+PTR	ns0.uklinux.net
80.84.64.21	A+PTR	www.uklinux.net
80.84.64.21	A	uklinux.net
80.84.64.24	PTR	subswebhost.uklinux.net
80.84.64.24	A	exegesis.uklinux.net
80.84.64.24	A	hobro.net
80.84.64.25	PTR	ns2.uklinux.net
80.84.64.26	PTR	mxbackup.uklinux.net
80.84.64.27	PTR	deliverymx.uklinux.net
80.84.64.37	A+PTR	s37.uklinux.net
80.84.64.39	A+PTR	s39.uklinux.net
80.84.64.39	A	freewebhost.uklinux.net
80.84.64.40	A+PTR	s40.uklinux.net
80.84.64.129	PTR	mx1.mailcentre-whole.co.uk
80.84.64.130	PTR	mx1.mailcentre-whole.co.uk
80.84.66.2	A	s1b.uklinux.net
80.84.66.3	A	s16.uklinux.net
80.84.66.16	PTR	uklinux.trcomputers.com
80.84.66.20	PTR	www.midgardic.com
80.84.66.24	PTR	www.erion.co.uk
80.84.66.24	A	mail.erion.co.uk
80.84.66.24	A	n2.erion.ltd.uk
80.84.66.28	A	fetedelariviere.com
80.84.66.28	A	mmbarques.com
80.84.66.33	PTR	mail.businesshr.net
80.84.66.37	A	dnuk.eu
80.84.66.41	PTR	new.jaztek.uklinux.net
80.84.66.41	A	mdpuk.com
80.84.67.44	PTR	ns5.zylem.com
80.84.67.46	PTR	ns6.zylem.com
80.84.69.10	PTR	mx1.mailcentre-whole.co.uk
80.84.69.11	PTR	mx1.mailcentre-whole.co.uk
80.84.69.21	A	cairnes.net
80.84.69.44	PTR	dedi4.uklinux.net
80.84.69.44	A	www.petefinnigan.com
80.84.69.44	A	petefinnigan.co.uk
80.84.69.51	PTR	misha1.uklinux.net.uk
80.84.69.51	A	ararita.ru
80.84.69.51	A	ararita.lenin.ru
80.84.70.2	PTR	fooks.uklinux.net