Robtex

Up: 69.56.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 69.56.40.0/22
Down right: 69.56.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
69.56.40.8	A	mail1.m.readwritelabs.com
69.56.40.9	PTR	mail1.members.sportsmemorabilia.com
69.56.40.9	A	mail2.m.readwritelabs.com
69.56.40.10	PTR	mail2.members.sportsmemorabilia.com
69.56.40.10	A	mail3.m.readwritelabs.com
69.56.40.11	PTR	mail3.members.sportsmemorabilia.com
69.56.40.11	A	mail4.m.readwritelabs.com
69.56.40.22	A	mail3.m.topixmail.com
69.56.40.23	A	mail4.m.topixmail.com
69.56.40.28	A	mail1.e.topixmail.com
69.56.40.29	A	mail2.e.topixmail.com
69.56.40.30	A	mail1.s.topixmail.com
69.56.40.31	A	mail2.s.topixmail.com
69.56.40.32	A	mail1.e.topionetworks.com
69.56.40.33	A	mail2.e.topionetworks.com
69.56.42.17	A+PTR	mail1.e.freedomworks.org
69.56.42.18	A+PTR	mail2.e.freedomworks.org
69.56.42.19	A+PTR	mail3.e.freedomworks.org
69.56.42.20	A+PTR	mail4.e.freedomworks.org
69.56.43.8	A+PTR	click1.peachnewsletters.com
69.56.43.8	A	peachnewsletters.com
69.56.43.9	A+PTR	mail1.peachnewsletters.com
69.56.43.10	A+PTR	mail2.peachnewsletters.com
69.56.43.11	PTR	mail3.peachnewsletters.com
69.56.46.32	A+PTR	mail1.theconservativevoice-mail.com
69.56.46.32	A	theconservativevoice-mail.com
69.56.46.33	A+PTR	mail2.theconservativevoice-mail.com
69.56.46.34	A+PTR	mail3.theconservativevoice-mail.com
69.56.46.35	PTR	mail4.theconservativevoice-mail.com
69.56.46.48	A+PTR	mail1.hcservices-email.com
69.56.46.49	A+PTR	mail2.hcservices-email.com
69.56.46.50	A+PTR	mail3.hcservices-email.com
69.56.46.104	A	click1.foresee-info.com
69.56.46.113	A	mail1.foresee-mail.com
69.56.46.114	A	mail2.foresee-mail.com
69.56.46.116	A	mail4.foresee-mail.com
69.56.46.118	A	mail6.foresee-mail.com
69.56.46.216	A	mail13.townhallmail.com
69.56.46.217	A	mail14.townhallmail.com
69.56.46.218	A	mail15.townhallmail.com
69.56.46.219	A	mail16.townhallmail.com
69.56.46.225	A	mail1.conservativeinvestormail.com
69.56.46.226	A	mail2.conservativeinvestormail.com
69.56.46.227	A	mail3.conservativeinvestormail.com
69.56.46.228	A	mail4.conservativeinvestormail.com
69.56.46.232	PTR	mail1.onlinepref.net
69.56.46.232	A	onlinepref.net
69.56.46.232	A	*.onlinepref.net
69.56.46.233	PTR	mail2.onlinepref.net
69.56.46.234	PTR	mail3.onlinepref.net
69.56.46.235	PTR	mail4.onlinepref.net
69.56.46.240	A+PTR	mail1.townhallmail.com
69.56.46.241	A+PTR	mail2.townhallmail.com
69.56.46.241	A	hostmaster.townhallmail.com
69.56.46.241	A	*.townhallmail.com
69.56.46.242	PTR	mail3.townhallmail.com
69.56.46.243	PTR	mail4.townhallmail.com
69.56.46.248	A	hotairemail.com
69.56.46.249	A	mail1.hotairemail.com
69.56.46.250	A	mail2.hotairemail.com
69.56.46.251	A	mail3.hotairemail.com