Robtex

Up: 66.97.46.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.97.46.0/25
Down right: 66.97.46.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.97.46.7	A+PTR	mx7.registeredsite.com
66.97.46.8	A	mx8.registeredsite.com
66.97.46.9	PTR	9.46.97.66.in-addr.arpa.hostmar.com
66.97.46.9	A	mx9.registeredsite.com
66.97.46.10	A	mx10.registeredsite.com
66.97.46.11	A+PTR	mx11.registeredsite.com
66.97.46.12	A	mx12.registeredsite.com
66.97.46.13	A+PTR	mx13.registeredsite.com
66.97.46.14	A	mx14.registeredsite.com
66.97.46.15	A	mx15.registeredsite.com
66.97.46.16	A+PTR	mx16.registeredsite.com
66.97.46.17	PTR	vps-1809947-x.dattaweb.com
66.97.46.17	A	mx17.registeredsite.com
66.97.46.18	A+PTR	mx18.registeredsite.com
66.97.46.19	A+PTR	mx19.registeredsite.com
66.97.46.20	A	mx20.registeredsite.com
66.97.46.21	A	mx21.registeredsite.com
66.97.46.22	A+PTR	mx22.registeredsite.com
66.97.46.23	A	mx23.registeredsite.com
66.97.46.24	A	mx24.registeredsite.com
66.97.46.25	A	mx25.registeredsite.com
66.97.46.26	A	mx26.registeredsite.com
66.97.46.59	A	norte.com
66.97.46.61	A+PTR	mx1.registeredsite.com
66.97.46.62	A+PTR	mx2.registeredsite.com
66.97.46.63	A	mx3.registeredsite.com
66.97.46.64	A+PTR	mx4.registeredsite.com
66.97.46.65	A+PTR	mx5.registeredsite.com
66.97.46.66	A+PTR	mx6.registeredsite.com
66.97.46.101	PTR	mailroot.core.registeredsite.com
66.97.46.101	A	mailroot-pub.core.registeredsite.com
66.97.46.103	PTR	103.46.97.66.in-addr.arpa.hostmar.com
66.97.46.103	A	ns1.webcom.ctmail.com
66.97.46.103	A	syslog2.core.registeredsite.com
66.97.46.104	A+PTR	report2.core.registeredsite.com
66.97.46.104	A	scompdb.registeredsite.com
66.97.46.107	A	bijouterieabigail.com.ar
66.97.46.117	A	mail.doctui.com
66.97.46.122	PTR	122.46.97.66.in-addr.arpa.hostmar.com
66.97.46.122	A	mail.potomacassoc.org
66.97.46.122	A	a-66-97-46-122.bertucasalonandspa.com
66.97.46.236	PTR	vps-1800981-x.dattaweb.com
66.97.46.236	A	api.codeshare.com.ar