Robtex

Up: 104.160.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 104.160.64.0/23
Down right: 104.160.66.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
104.160.64.8	PTR	getresponse.com
104.160.64.8	A	inktest.getresponse.com
104.160.64.8	A	am-red.getresponse.com
104.160.64.9	PTR	norevdns.getresponse.com
104.160.64.10	PTR	billing.getresponse.com
104.160.64.11	PTR	norevdns.getresponse.com
104.160.64.12	A	email.vemma.com
104.160.64.13	A+PTR	smtp-in.getresponse.com
104.160.64.14	PTR	norevdns.getresponse.com
104.160.64.14	A	affiliates.getresponse.com
104.160.64.15	PTR	norevdns.getresponse.com
104.160.64.15	A	indyrentalreport.com
104.160.64.17	PTR	norevdns.getresponse.com
104.160.64.17	A	guidancenewsletters.com
104.160.64.17	A	innerartistnews.com
104.160.64.19	PTR	norevdns.getresponse.com
104.160.64.23	PTR	norevdns.getresponse.com
104.160.64.23	A	senderdelivery.com
104.160.64.23	A	hyperinfo.net
104.160.64.24	PTR	norevdns.getresponse.com
104.160.64.24	A	alessiacapozzishop.com
104.160.64.30	PTR	norevdns.getresponse.com
104.160.64.30	A	ws.getresponse.com
104.160.64.30	A	ls.getresponse.com
104.160.64.48	A+PTR	mta-17.confirmations.getresponse.com
104.160.64.64	PTR	norevdns.getresponse.com
104.160.64.64	A	multimedia.newsletter.nianticlabs.com
104.160.64.64	A	multimedia.getresponse360.com
104.160.64.65	PTR	norevdns.getresponse.com
104.160.64.77	PTR	norevdns.getresponse.com
104.160.64.77	A	getresponse-integrations.com
104.160.64.77	A	track.getresponse-integrations.com
104.160.64.78	A	hostmaster.getrevenue.com
104.160.64.83	PTR	mta-2.omega.getresponse-mail.com
104.160.64.86	A	mta-5.omega.getresponse-mail.com
104.160.64.97	A+PTR	mta-18.alfa.getresponse.com
104.160.64.100	A+PTR	mta-21.alfa.getresponse.com
104.160.64.140	A+PTR	mta-1.beta.getresponse.com
104.160.64.141	A+PTR	mta-2.beta.getresponse.com
104.160.64.142	A+PTR	mta-3.alfa.getresponse-mail.com
104.160.64.142	A	mta-3.beta.getresponse.com
104.160.64.143	PTR	mta-4.beta.getresponse.com
104.160.64.144	A+PTR	mta-5.beta.getresponse.com
104.160.64.145	A+PTR	mta-6.beta.getresponse.com
104.160.64.146	A+PTR	mta-7.beta.getresponse.com
104.160.64.147	A+PTR	mta-8.beta.getresponse.com
104.160.64.148	A+PTR	mta-9.beta.getresponse.com
104.160.64.149	A+PTR	mta-10.beta.getresponse.com
104.160.64.172	A+PTR	mta-1.beta.getresponse-mail.com
104.160.64.175	PTR	mta-4.beta.gr-mail1.com
104.160.64.180	A+PTR	mta-9.beta.getresponse-mail.com
104.160.64.181	A+PTR	mta-10.beta.getresponse-mail.com
104.160.65.1	PTR	mta-1.gamma.gr-mail1.com
104.160.65.1	A	mta-1.gamma.getresponse.com
104.160.65.2	A+PTR	mta-2.gamma.getresponse.com
104.160.65.2	A	mta-2.gamma.getresponse-mail.com
104.160.65.3	A	mta-3.gamma.getresponse-mail.com
104.160.65.4	A+PTR	mta-4.gamma.getresponse-mail.com
104.160.65.4	A	mta-4.gamma.getresponse.com
104.160.65.5	PTR	mta-5.gamma.getresponse.com
104.160.65.6	PTR	mta-6.gamma.gr-mail1.com
104.160.65.6	A	mta-6.gamma.getresponse.com
104.160.65.6	A	mta-6.gamma.getresponse-mail.com
104.160.65.7	PTR	mta-7.gamma.getresponse.com
104.160.65.8	PTR	mta-8.gamma.getresponse-mail.com
104.160.65.8	A	mta-8.gamma.getresponse.com
104.160.65.9	A+PTR	mta-9.gamma.getresponse.com
104.160.65.9	A	mta-9.gamma.getresponse-mail.com
104.160.65.10	A+PTR	mta-10.gamma.getresponse.com
104.160.65.11	PTR	mta-11.gamma.gr-mail1.com
104.160.65.12	A+PTR	mta-12.gamma.getresponse.com
104.160.65.13	A+PTR	mta-13.gamma.getresponse.com
104.160.65.13	A	mta-13.gamma.getresponse-mail.com
104.160.65.14	A+PTR	mta-14.gamma.getresponse.com
104.160.65.15	PTR	mta-15.gamma.getresponse.com
104.160.65.16	A+PTR	mta-16.gamma.getresponse.com
104.160.65.16	A	mta-16.gamma.getresponse-mail.com
104.160.65.17	A+PTR	mta-17.gamma.getresponse.com
104.160.65.17	A	mta-17.gamma.getresponse-mail.com
104.160.65.18	PTR	mta-18.gamma.getresponse.com
104.160.65.19	PTR	mta-19.gamma.getresponse.com
104.160.65.20	PTR	mta-20.gamma.getresponse.com
104.160.65.20	A	mta-20.gamma.getresponse-mail.com
104.160.65.21	A+PTR	mta-21.gamma.getresponse.com
104.160.65.21	A	mta-21.gamma.getresponse-mail.com
104.160.65.22	A+PTR	mta-22.gamma.getresponse-mail.com
104.160.65.23	PTR	mta-23.gamma.getresponse-mail.com
104.160.65.24	PTR	mta-24.gamma.getresponse.com
104.160.65.24	A	mta-24.gamma.getresponse-mail.com
104.160.65.25	A+PTR	mta-25.gamma.getresponse.com
104.160.65.25	A	mta-25.gamma.getresponse-mail.com
104.160.65.26	A+PTR	mta-26.gamma.getresponse.com
104.160.65.27	PTR	mta-27.gamma.getresponse.com
104.160.65.28	A+PTR	mta-28.gamma.getresponse.com
104.160.65.28	A	mta-28.gamma.getresponse-mail.com
104.160.65.29	A+PTR	mta-29.gamma.getresponse.com
104.160.65.29	A	mta-29.gamma.getresponse-mail.com
104.160.65.30	PTR	mta-30.gamma.getresponse.com
104.160.65.31	PTR	mta-31.gamma.getresponse.com
104.160.65.32	A+PTR	mta-32.gamma.getresponse.com
104.160.65.32	A	mta-32.gamma.getresponse-mail.com
104.160.65.33	A+PTR	mta-33.gamma.getresponse.com
104.160.65.34	A+PTR	mta-34.gamma.getresponse.com
104.160.65.35	PTR	mta-35.gamma.getresponse.com
104.160.65.37	A+PTR	mta-37.gamma.getresponse-mail.com
104.160.65.48	PTR	mta-48.gamma.getresponse-mail.com
104.160.65.49	A+PTR	mta-49.gamma.getresponse-mail.com
104.160.65.50	A+PTR	mta-50.gamma.getresponse-mail.com
104.160.65.51	A+PTR	mta-51.gamma.getresponse-mail.com
104.160.65.52	A+PTR	mta-52.gamma.getresponse-mail.com
104.160.65.53	A+PTR	mta-53.gamma.getresponse-mail.com
104.160.65.54	A+PTR	mta-54.gamma.getresponse-mail.com
104.160.65.55	A+PTR	mta-55.gamma.getresponse-mail.com
104.160.65.56	A+PTR	mta-56.gamma.getresponse-mail.com
104.160.65.57	A+PTR	mta-57.gamma.getresponse-mail.com
104.160.65.58	A+PTR	mta-58.gamma.getresponse-mail.com
104.160.65.59	A+PTR	mta-59.gamma.getresponse-mail.com
104.160.65.60	A+PTR	mta-60.gamma.getresponse-mail.com
104.160.65.61	A+PTR	mta-61.gamma.getresponse-mail.com
104.160.65.62	A+PTR	mta-62.gamma.getresponse-mail.com
104.160.65.63	A+PTR	mta-63.gamma.getresponse-mail.com
104.160.65.64	A+PTR	mta-64.gamma.getresponse-mail.com
104.160.65.66	A+PTR	mta-66.gamma.getresponse-mail.com
104.160.65.67	A+PTR	mta-67.gamma.getresponse-mail.com
104.160.65.68	A+PTR	mta-68.gamma.getresponse-mail.com
104.160.65.69	A+PTR	mta-69.gamma.getresponse-mail.com
104.160.65.70	A+PTR	mta-70.gamma.getresponse-mail.com
104.160.65.71	A+PTR	mta-71.gamma.getresponse-mail.com
104.160.65.72	A+PTR	mta-72.gamma.getresponse-mail.com
104.160.65.73	A+PTR	mta-73.gamma.getresponse-mail.com
104.160.65.74	A+PTR	mta-74.gamma.getresponse-mail.com
104.160.65.75	A+PTR	mta-75.gamma.getresponse-mail.com
104.160.65.76	A+PTR	mta-76.gamma.getresponse-mail.com
104.160.65.77	A+PTR	mta-77.gamma.getresponse-mail.com
104.160.65.78	A+PTR	mta-78.gamma.getresponse-mail.com
104.160.65.79	A+PTR	mta-79.gamma.getresponse-mail.com
104.160.65.80	A+PTR	mta-80.gamma.getresponse-mail.com
104.160.65.87	PTR	mta-87.gamma.getresponse-mail.com
104.160.65.133	A+PTR	mta-133.gamma.getresponse-mail.com
104.160.66.8	PTR	norevdns.getresponse.com
104.160.66.9	PTR	norevdns.getresponse.com
104.160.66.9	A	clickwebinar.de
104.160.66.9	A	clickwebinar.ru
104.160.66.10	PTR	norevdns.getresponse.com
104.160.66.11	PTR	norevdns.getresponse.com
104.160.66.12	PTR	norevdns.getresponse.com
104.160.66.12	A	clickconference.com
104.160.66.12	A	clicktraining.com
104.160.66.132	A	video.implix.com
104.160.66.142	A+PTR	smtp.clickmeeting.com
104.160.66.144	A+PTR	ns1.implix.com
104.160.66.144	A	dns1.getresponse.com
104.160.66.144	A	ns1.getresponse.com
104.160.66.145	A	ns2.paylane.com
104.160.66.146	PTR	ns-a-1.getresponse360.com
104.160.66.235	A	mta-1.zukr.com
104.160.66.237	A+PTR	mta-1.getresponse360.com
104.160.66.237	A	reallusion.getresponse360.com
104.160.66.237	A	bird.getresponse360.com
104.160.66.239	PTR	mail.websitewizard.com
104.160.66.240	A+PTR	ns1.websitewizard.com
104.160.66.254	A+PTR	nat-out.getresponse.com
104.160.66.254	A	mx.mailout.implix.com
104.160.67.8	A	com--zhanghui.vemma.com
104.160.67.8	A	porno-vemmamangosteen.vemma.com
104.160.67.8	A	kidjr.vemma.com
104.160.67.12	A	clickmeeting.com
104.160.67.45	A	mta.vemmaeurope.com
104.160.67.64	PTR	norevdns.getresponse.com
104.160.67.64	A	implix.co.uk
104.160.67.64	A	0.revdns.implix.com
104.160.67.65	PTR	mx.mailout.implix.com
104.160.67.68	PTR	norevdns.getresponse.com
104.160.67.68	A	mailhub.implix.com
104.160.67.69	PTR	norevdns.getresponse.com
104.160.67.69	A	hostmaster.mailz.com
104.160.67.69	A	*.sendnow.net
104.160.67.72	PTR	norevdns.getresponse.com
104.160.67.72	A	theiamcharity.com
104.160.67.72	A	hostmaster.teamelite.us
104.160.67.73	PTR	redir.getresponse.com
104.160.67.74	PTR	norevdns.getresponse.com
104.160.67.75	PTR	norevdns.getresponse.com
104.160.67.76	PTR	norevdns.getresponse.com
104.160.67.76	A	squeeze.getresponse360.com
104.160.67.76	A	mynaturaloption.com
104.160.67.89	PTR	norevdns.getresponse.com
104.160.67.89	A	smtp-1.mailz.com
104.160.67.95	A+PTR	mta.inboxinspector.com
104.160.67.96	PTR	norevdns.getresponse.com
104.160.67.96	A	mx.baltmedia.com
104.160.67.96	A	apartamentywsopocie.com
104.160.67.98	PTR	ns2.implix.com
104.160.67.99	PTR	norevdns.getresponse.com
104.160.67.101	A+PTR	ns2.websitewizard.com
104.160.67.128	PTR	mta-1.delta.gr-mail1.com
104.160.67.128	A	mta-1.delta.getresponse.com
104.160.67.129	A+PTR	mta-2.delta.getresponse.com
104.160.67.130	A+PTR	mta-3.delta.getresponse.com
104.160.67.131	A+PTR	mta-4.delta.getresponse.com
104.160.67.134	A+PTR	mta-7.delta.getresponse.com
104.160.67.135	A	mta-8.delta.getresponse.com
104.160.67.136	A+PTR	mta-9.delta.getresponse.com
104.160.67.146	A+PTR	mta-19.delta.getresponse-mail.com
104.160.67.149	A+PTR	mta-22.delta.getresponse-mail.com
104.160.67.150	A+PTR	mta-23.delta.getresponse-mail.com
104.160.67.191	A	mta-64.delta.getresponse.com
104.160.67.192	A+PTR	mta-65.delta.getresponse.com
104.160.67.193	A+PTR	mta-66.delta.getresponse.com
104.160.67.194	A+PTR	mta-67.delta.getresponse.com
104.160.67.195	A+PTR	mta-68.delta.getresponse.com
104.160.67.196	A+PTR	mta-69.delta.getresponse.com
104.160.67.197	A+PTR	mta-70.delta.getresponse.com
104.160.67.198	A	mta-71.delta.getresponse.com
104.160.67.199	A	mta-72.delta.getresponse.com
104.160.67.200	A+PTR	mta-73.delta.getresponse.com
104.160.67.201	A+PTR	mta-74.delta.getresponse.com
104.160.67.202	A+PTR	mta-75.delta.getresponse.com
104.160.67.203	A+PTR	mta-76.delta.getresponse.com
104.160.67.204	A+PTR	mta-77.delta.getresponse.com
104.160.67.205	A+PTR	mta-78.delta.getresponse.com
104.160.67.206	A+PTR	mta-79.delta.getresponse.com