Robtex

Up: 66.90.74.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 66.90.74.0/26
Down right: 66.90.74.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.90.74.2	PTR	mta-2.mail.neverwintersites.info
66.90.74.4	PTR	mta-4.mail.neverwintersites.info
66.90.74.5	PTR	mta-5.mail.neverwintersites.info
66.90.74.10	PTR	bcalertnewsmail.com
66.90.74.11	PTR	bcalertnewsmail.com
66.90.74.12	PTR	bcalertnewsmail.com
66.90.74.13	PTR	bcalertnewsmail.com
66.90.74.18	PTR	ns2.layerweb.net
66.90.74.26	A	terminus.inflict.us
66.90.74.27	A	49qs.com
66.90.74.27	A	mx.inflict.us
66.90.74.28	PTR	inflict.us
66.90.74.28	A	jokegrader.com
66.90.74.28	A	www.whatyouhate.com
66.90.74.30	A	ns1.dmnotebook.com
66.90.74.30	A	ns1.sickexcuse.com
66.90.74.30	A	ns1.notebookten.com
66.90.74.34	PTR	ma.centredating.com
66.90.74.35	PTR	mb.centredating.com
66.90.74.36	PTR	mc.centredating.com
66.90.74.37	PTR	md.centredating.com
66.90.74.38	PTR	me.centredating.com
66.90.74.39	PTR	mf.centredating.com
66.90.74.40	PTR	mg.centredating.com
66.90.74.43	PTR	mj.centredating.com
66.90.74.44	PTR	mk.centredating.com
66.90.74.58	A	ns4.astravideos.com
66.90.74.60	A	mail.sishco.com
66.90.74.74	PTR	server4.launch-lawfirm.info
66.90.74.75	PTR	server4.launch-lawfirm.info
66.90.74.76	PTR	server4.launch-lawfirm.info
66.90.74.84	PTR	techmanage.com
66.90.74.85	PTR	marchese-desade.org
66.90.74.86	PTR	1360wlbk.com
66.90.74.88	PTR	techmanage.net
66.90.74.90	PTR	foster.gigapros.com
66.90.74.90	A	voicesofgermany.com
66.90.74.90	A	voicesofnewzealand.com
66.90.74.91	PTR	foster.gigapros.com
66.90.74.92	PTR	foster.gigapros.com
66.90.74.93	PTR	foster.gigapros.com
66.90.74.94	PTR	foster.gigapros.com
66.90.74.110	A	mail.pokeramerica.com
66.90.74.117	PTR	cfh045.ausnetservers.net.au
66.90.74.122	PTR	appliedirc.com