Robtex

Up: 216.21.224.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.21.224.0/25
Down right: 216.21.224.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.21.224.10	PTR	www.namebargain.com
216.21.224.34	PTR	download.register.com
216.21.224.119	A	ceto.to
216.21.224.125	A+PTR	mask01.register.com
216.21.224.126	A+PTR	mask02.register.com
216.21.224.129	A+PTR	atlmail01.galt.register.com
216.21.224.129	A	spf.webnames.ca
216.21.224.129	A	mail01.njeq.register.com
216.21.224.130	A+PTR	atlmail02.galt.register.com
216.21.224.130	A	mail02.njeq.register.com
216.21.224.154	PTR	ns2.register.com
216.21.224.155	PTR	ns4.register.com
216.21.224.172	A	sitebuilder.web.com
216.21.224.176	A+PTR	smtpc.register.com
216.21.224.188	A+PTR	mailgw.hosting.register.com
216.21.224.196	A	payconserve.com
216.21.224.197	A	parkmobileinternational.com
216.21.224.197	A	grahampallet.com
216.21.224.198	A	awattersforjustice.com
216.21.224.198	A	rockingnailswithrobin.com
216.21.224.198	A	myunderstnding.com
216.21.224.199	A	sitebuilder.web.com
216.21.224.199	A	loveswildliferemoval.com
216.21.224.199	A	luminationsgroup.net
216.21.224.200	A	*.hunkylads.com
216.21.224.200	A	*.my-glassesonline.com
216.21.224.200	A	10.ep-tech.co.uk
216.21.224.201	A	windowslive.register.com
216.21.224.202	A	www.btdomainmanager.com
216.21.224.203	A	*.idrisconsultancy.co.uk
216.21.224.203	A	*.com.sfulford.com
216.21.224.203	A	www.coxmoor.com
216.21.224.210	A	www.btdomainsaccount.com
216.21.224.210	A	btdomainsaccount.com
216.21.224.216	A	unlimitedlocalclicks.com
216.21.224.216	A	leadlogic.com
216.21.224.216	A	sprintsmgreports.com
216.21.224.219	A	rjssolar.com
216.21.224.220	A	smtp.register.com
216.21.224.220	A	smtpe.register.com
216.21.224.222	A	smartclickslocal.com
216.21.224.222	A	localadwords.net
216.21.224.222	A	guaranteedlocalclicks.com
216.21.224.239	A	briermere.com