Robtex

Up: 66.64.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.64.16.0/22
Down right: 66.64.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.64.16.8	A	mayl.envoii.net
66.64.16.58	PTR	58-16-64.66.static.logixcom.net
66.64.16.81	PTR	81-16-64.66.static.logixcom.net
66.64.16.100	A	cardealerflagpoles.com
66.64.16.100	A	flagpole.info
66.64.16.180	A	mail.communitytaxteam.com
66.64.16.180	A	mail.communitytaxdallas.com
66.64.16.180	A	mail.ctrtaxrelief.com
66.64.16.183	A	mail.tnminterests.com
66.64.16.194	A	mail.secure-cm.com
66.64.16.194	A	email.collectionsandaccountsreceivable.com
66.64.17.162	PTR	162-17-64.66.static.logixcom.net
66.64.17.162	A	douglasavenue.us
66.64.17.162	A	mail.douglasavenue.us
66.64.18.18	A	email.cosourceinc.com
66.64.18.19	A	mail.jobsitefuel.net
66.64.18.82	A	dns.sonnystewart.com
66.64.18.82	A	smtp.fwforgedie.com
66.64.18.82	A	dns.fwforgedie.com
66.64.18.106	PTR	mail.on-board.com
66.64.18.106	A	obccom.com
66.64.18.134	A	mail2.itsinc-tx.com
66.64.18.134	A	mail.itsinc-tx.com
66.64.18.145	PTR	145-18-64.66.static.logixcom.net
66.64.19.148	A	mail.unitedwaytarrant.org
66.64.19.250	A	mail.ahscpas.com
66.64.20.98	A	nmail.imeet.biz
66.64.20.211	A	lawserver.carlockgormley.com
66.64.20.226	A	mail.c2mtech.com
66.64.21.50	PTR	50-21-64.66.static.logixcom.net
66.64.21.52	A	olsoffice.com
66.64.21.90	A	mail.cecosales.com
66.64.21.90	A	mail.spillteamdirect.com
66.64.21.91	PTR	91-21-64.66.static.logixcom.net
66.64.21.91	A	cecosales.com
66.64.21.91	A	www.cecosales.com
66.64.21.180	A	mail2.esposecurities.com
66.64.21.180	A	mail2.espositoglobal.com
66.64.21.180	A	barracuda1.espoglobal.com
66.64.21.186	PTR	186-21-64.66.static.logixcom.net
66.64.21.186	A	film-tech.net
66.64.21.187	A	855-film-tech.com
66.64.22.162	A+PTR	mail.murphymahon.com
66.64.22.243	A	mail.lbucc.org
66.64.23.66	A	remote.nurseshci.net
66.64.23.98	A+PTR	mail.walterx.com
66.64.23.98	A	walterx.com
66.64.23.106	A	ervisionsource.com
66.64.23.154	PTR	mail.taxease.com
66.64.23.154	A	mail.teliky.com
66.64.23.198	A	winstonwatercooler.com
66.64.23.198	A	soiconline.org