Robtex

Up: 66.239.2.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.239.2.0/25
Down right: 66.239.2.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.239.2.4	PTR	ns1.nwresearch.com
66.239.2.6	PTR	bukoos.com
66.239.2.6	PTR	mail.nwresearch.com
66.239.2.6	PTR	mail01.nwresearch.com
66.239.2.8	PTR	bulward.com
66.239.2.8	PTR	nwresearch.com
66.239.2.8	PTR	nwri.com
66.239.2.9	A+PTR	nwresearch.com
66.239.2.9	A+PTR	nwri.com
66.239.2.9	A	www.nwresearch.com
66.239.2.10	A+PTR	www.navi4.com
66.239.2.10	A	navi4.com
66.239.2.11	PTR	bulward.com
66.239.2.11	A	luckyaces.com
66.239.2.11	A	bulwardauction.com
66.239.2.15	A+PTR	ns2.nwresearch.com
66.239.2.16	PTR	exchange.nwresearch.com
66.239.2.16	PTR	imap.nwresearch.com
66.239.2.16	PTR	smtp.nwresearch.com
66.239.2.17	A	ns2.nwresearch.com
66.239.2.19	A	ddfsyfiimhxmsnhyacpdl.com
66.239.2.67	A	smtp.nwresearch.com
66.239.2.67	A	mailserver.nwresearch.com
66.239.2.67	A	mail01.nwresearch.com
66.239.2.70	A	www.navi4.com
66.239.2.138	A	mheder.com