Robtex

Up: 84.234.20.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 84.234.20.0/24
Down right: 84.234.21.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.234.20.10	A	mx2.mossbox.co.uk
84.234.20.10	A	mxrelay.webbedit.net
84.234.20.10	A	mxrelay.techspecuk.com
84.234.20.11	A	ns11.netrino.co.uk
84.234.20.52	PTR	phroco.com
84.234.21.3	A	ns2.a1isp.co.uk
84.234.21.3	A	mail.evolutiondsl.net
84.234.21.3	A	mail.studioisabel.com
84.234.21.11	PTR	vm1.inspiration7.co.uk
84.234.21.16	A	dpnss.co.uk
84.234.21.16	A	mail.dpnss.co.uk
84.234.21.16	A	ksgg.co.uk
84.234.21.19	A+PTR	tank.fsck.co.uk
84.234.21.26	A	ns3.shackledmaidens.co.uk
84.234.21.26	A	ns1.mediabug.co.uk
84.234.21.30	A	ns2.mediabug.co.uk
84.234.21.34	PTR	linux04.thelawtons.co.uk
84.234.21.34	A	thelawtons.us
84.234.21.35	PTR	mail.raqsys.com
84.234.21.35	A	mail.colinwoodhouse.co.uk
84.234.21.35	A	mail.raqsys.net
84.234.21.52	A	imams.info
84.234.21.53	A	faithway.co.uk
84.234.21.53	A	skillshortages.org
84.234.21.56	A	mail2.networksystemssolutions.co.uk
84.234.21.65	PTR	itchgroup.co.uk
84.234.21.65	A	mail.itchmusicltd.com
84.234.21.70	A+PTR	deancode.co.uk
84.234.21.70	A	jonathanandsabrina.co.uk
84.234.21.70	A	surrounded.org.uk
84.234.21.137	A	web02.starfields.net
84.234.21.138	A	web04.starfields.net
84.234.21.148	A	solar.staroverip.net
84.234.21.163	A	lists.starfields.net
84.234.21.171	A	ns2.alfsonet.com
84.234.21.186	PTR	inventoryclerk.org
84.234.21.186	A	inventoryclerklicense.com
84.234.21.186	A	inventoryclerklicense.co.uk
84.234.21.191	PTR	globe-hosting.co.uk
84.234.21.198	A	jugglingjules.com
84.234.21.227	A	myeastbourne.com
84.234.21.240	A	accountsandlegals.com
84.234.21.251	A	mail.jugglingjules.com