Robtex

Up: 66.11.134.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.11.135.0/25
Down right: 66.11.135.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.11.135.4	PTR	mailer13.anastasiaweb.com
66.11.135.5	A	mx2.russianbrides.com
66.11.135.5	A	mx2.russianbridemailings.com
66.11.135.11	A	mailer14.anastasiaweb.com
66.11.135.15	PTR	ob-smtp1.asianbeauties.com
66.11.135.15	A	mx1.globalcompanions.com
66.11.135.16	PTR	ob-smtp2.asianbeauties.com
66.11.135.16	A	mx2.globalcompanions.com
66.11.135.17	A+PTR	smtp.welcome-to-russia.com
66.11.135.18	PTR	mx1.russianbrides.com
66.11.135.23	A	habibidate.com
66.11.135.25	PTR	25.135.11.66.staffordnet.com
66.11.135.25	A	amolatina.anastasiasaffiliate.com
66.11.135.25	A	*.anastasiasaffiliate.com
66.11.135.26	PTR	26.135.11.66.staffordnet.com
66.11.135.26	A	extservice.anastasiadate.com
66.11.135.27	A	meetyourfriends.com
66.11.135.27	A	www.meetyourfriends.com
66.11.135.29	A+PTR	mexch.global-companions.com
66.11.135.29	A	*.triptogether.com
66.11.135.29	A	triptogether.com
66.11.135.31	PTR	31.135.11.66.staffordnet.com
66.11.135.75	A+PTR	exchange.staffordnet.com
66.11.135.75	A	mail.oceansafesteelsip.com
66.11.135.75	A	exch1.staffordnet.com
66.11.135.77	PTR	77.135.11.66.staffordnet.com
66.11.135.77	A	mail.egapc.com
66.11.135.77	A	webmail.heimer.com
66.11.135.80	PTR	80.135.11.66.staffordnet.com
66.11.135.80	A	mynefcu.org
66.11.135.80	A	www.mynefcu.org
66.11.135.81	PTR	81.135.11.66.staffordnet.com
66.11.135.81	A	business.mynefcu.org
66.11.135.130	A	watermanagementtool.com
66.11.135.131	A	upside-learning.com
66.11.135.131	A	upside-us5.upside-learning.com
66.11.135.135	PTR	upside-us8.upside-learning.com
66.11.135.143	PTR	143.135.11.66.staffordnet.com
66.11.135.196	PTR	196.135.11.66.staffordnet.com
66.11.135.196	A	amperedigital.com
66.11.135.196	A	ips.oauife.edu.ng
66.11.135.210	PTR	210.135.11.66.staffordnet.com
66.11.135.220	PTR	220.135.11.66.staffordnet.com
66.11.135.220	A	smtp.hockeypucks.com
66.11.135.220	A	vstamp.com
66.11.135.222	A	expensefiler.com
66.11.135.222	A	billfiler.com
66.11.135.222	A	certfiler.com
66.11.135.223	PTR	223.135.11.66.staffordnet.com
66.11.135.223	A	mail.ptorange.com
66.11.135.227	PTR	227.135.11.66.staffordnet.com
66.11.135.227	A	teamlogic.org
66.11.135.231	PTR	231.135.11.66.staffordnet.com
66.11.135.231	A	*.brustio.com
66.11.135.231	A	www.brustio.com
66.11.135.232	PTR	232.135.11.66.staffordnet.com
66.11.135.232	A	*.clarionins.com
66.11.135.232	A	musiciansdugout.com
66.11.135.233	A	clarionapp.com
66.11.135.234	PTR	234.135.11.66.staffordnet.com
66.11.135.234	A	teamlogic.org
66.11.135.234	A	dm-pop.com
66.11.135.241	PTR	241.135.11.66.staffordnet.com
66.11.135.241	A	smtp.usnonwovens.com
66.11.135.244	PTR	244.135.11.66.staffordnet.com
66.11.135.244	A	smtp.usnonwovens.com
66.11.135.244	A	mail.usnonwovens.com
66.11.135.246	PTR	246.135.11.66.staffordnet.com
66.11.135.246	A	ns1.aptglobe.net
66.11.135.247	PTR	247.135.11.66.staffordnet.com
66.11.135.248	A	promostamp.com
66.11.135.248	A	hockeypucks.com