Robtex

Up: 64.50.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 64.50.144.0/21
Down right: 64.50.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.50.144.6	A	ba6.scsend.net
64.50.144.8	A	app.mailworkz.com
64.50.144.8	A	ezlistz.com
64.50.144.8	A	simplycast.net
64.50.144.17	A+PTR	ba17.scsend.net
64.50.144.50	PTR	app.simplycast.com
64.50.144.50	A	bounce.emailos.com
64.50.144.50	A	bounce.marketinggalaxy.com
64.50.145.2	A	sa2.scsend.com
64.50.145.6	A	sa6.scsend.com
64.50.145.10	A	sa10.scsend.com
64.50.145.19	A+PTR	mail1.marketing.eastlink.ca
64.50.145.21	A	mail3.marketing.eastlink.ca
64.50.145.25	A	sa25.scsend.com
64.50.145.32	A+PTR	sa32.scsend.com
64.50.145.43	A	sa43.scsend.com
64.50.145.44	A	newsletter.longisland.com
64.50.145.48	A	sa48.scsend.com
64.50.145.49	A+PTR	sa49.scsend.com
64.50.145.50	A	sa50.scsend.com
64.50.145.55	A	sa55.scsend.com
64.50.145.64	A	sa64.scsend.com
64.50.145.70	A	sa70.scsend.com
64.50.145.73	A	sa73.scsend.com
64.50.145.76	A	sa76.scsend.com
64.50.145.83	A	sa83.scsend.com
64.50.145.92	A	sa92.scsend.com
64.50.145.93	A	sa93.scsend.com
64.50.145.97	A+PTR	sa97.scsend.com
64.50.145.105	A	sa105.scsend.com
64.50.145.107	A	sa107.scsend.com
64.50.145.110	A	sa110.scsend.com
64.50.145.113	A	sa113.scsend.com
64.50.145.114	A+PTR	sa114.scsend.com
64.50.145.119	A	sa119.scsend.com
64.50.145.123	A	sa123.scsend.com
64.50.145.138	A	sa138.scsend.com
64.50.145.140	A	sa140.scsend.com
64.50.145.154	A	sa154.scsend.com
64.50.145.155	A	sa155.scsend.com
64.50.145.156	A	sa156.scsend.com
64.50.145.159	A	sa159.scsend.com
64.50.145.160	A+PTR	sa160.scsend.com
64.50.145.223	A	sa223.scsend.com
64.50.146.1	PTR	scmc002.net
64.50.146.1	A	regopolis.com
64.50.146.48	A	64-50-146-48.client.dsl.net
64.50.146.50	A+PTR	ga50.scsend.net
64.50.146.70	A	ga70.scsend.net
64.50.146.243	A+PTR	ga243.scsend.net
64.50.146.247	A	ga247.scsend.net
64.50.148.6	A	sb6.scsend.net
64.50.148.110	A	maila.marketinggalaxy.com
64.50.148.174	A	sb174.scsend.net
64.50.148.208	A	sb208.scsend.net
64.50.149.1	A+PTR	bb1.scsend.net
64.50.149.2	A+PTR	bb2.scsend.net
64.50.149.5	A	bb5.scsend.net
64.50.149.7	A	bb7.scsend.net
64.50.149.17	A	bb17.scsend.net
64.50.149.20	A	bb20.scsend.net
64.50.149.21	A	bb21.scsend.net
64.50.149.22	A	bb22.scsend.net
64.50.149.35	A	bb35.scsend.net
64.50.149.40	A	bb40.scsend.net
64.50.149.46	A	bb46.scsend.net
64.50.149.81	A+PTR	bb81.scsend.net
64.50.149.100	A	bb100.scsend.net
64.50.149.177	A	bb177.scsend.net
64.50.149.187	A	bb187.scsend.net
64.50.149.210	A	bb210.scsend.net
64.50.150.6	A	ha6.scsend.net
64.50.150.13	A	ha13.scsend.net
64.50.150.29	A	ha29.scsend.net
64.50.150.41	A	ha41.scsend.net
64.50.150.125	A	ha125.scsend.net
64.50.150.137	A	ha137.scsend.net
64.50.150.142	A	ha142.scsend.net
64.50.150.159	A	ha159.scsend.net
64.50.150.167	A	ha167.scsend.net
64.50.150.188	A	ha188.scsend.net
64.50.150.190	A	ha190.scsend.net
64.50.150.224	A	ha224.scsend.net
64.50.150.248	A	ha248.scsend.net
64.50.150.250	A	ha250.scsend.net
64.50.151.2	A+PTR	hb2.emailos.com
64.50.151.3	A	hb3.emailos.com
64.50.151.5	A	hb5.emailos.com
64.50.151.11	A	hb11.emailos.com
64.50.151.16	A	hb16.emailos.com
64.50.151.18	A	hb18.emailos.com
64.50.151.19	A+PTR	hb19.emailos.com
64.50.151.24	A	hb24.emailos.com
64.50.151.34	A	hb34.emailos.com
64.50.151.35	A	hb35.emailos.com
64.50.151.36	A	hb36.emailos.com
64.50.151.40	A	hb40.emailos.com
64.50.151.49	A+PTR	hb49.emailos.com
64.50.151.52	A	hb52.emailos.com
64.50.151.53	A	hb53.emailos.com
64.50.151.54	A	hb54.emailos.com
64.50.151.67	A+PTR	hb67.emailos.com
64.50.151.77	A	hb77.emailos.com
64.50.151.78	A	hb78.emailos.com
64.50.151.87	A	hb87.emailos.com
64.50.151.94	A	hb94.emailos.com
64.50.151.97	A	hb97.emailos.com
64.50.151.99	A	hb99.emailos.com
64.50.151.101	A	hb101.emailos.com
64.50.151.102	A	hb102.emailos.com
64.50.151.113	A	hb113.emailos.com
64.50.151.116	A	hb116.emailos.com
64.50.151.129	A	hb129.emailos.com
64.50.151.140	A	hb140.emailos.com
64.50.151.144	A+PTR	hb144.emailos.com
64.50.151.151	A	hb151.emailos.com
64.50.151.153	A	hb153.emailos.com
64.50.151.164	A	hb164.emailos.com
64.50.151.167	A	hb167.emailos.com
64.50.151.175	A	hb175.emailos.com
64.50.151.176	A	hb176.emailos.com
64.50.151.177	A	hb177.emailos.com
64.50.151.180	A	hb180.emailos.com
64.50.151.181	A	hb181.emailos.com
64.50.151.192	A	hb192.emailos.com
64.50.151.193	A	hb193.emailos.com
64.50.151.194	A+PTR	hb194.emailos.com
64.50.151.195	A	hb195.emailos.com
64.50.151.225	A	hb225.emailos.com
64.50.151.229	A	hb229.emailos.com
64.50.151.232	A	hb232.emailos.com
64.50.151.235	A	hb235.emailos.com
64.50.151.248	A	hb248.emailos.com
64.50.151.252	A	hb252.emailos.com
64.50.152.24	A+PTR	transactional.emailboster.com
64.50.152.134	A+PTR	mailer4.marketer365.com
64.50.152.183	A+PTR	mailer1.yillou.net
64.50.153.249	A	64-50-153-249.client.dsl.net
64.50.155.4	A	zebratrackz.com
64.50.155.4	A	simplycast.mobi
64.50.155.4	A	marketinggalaxy.com
64.50.155.28	A+PTR	ns2.scsend.net
64.50.155.29	A+PTR	ns1.scsend.net
64.50.155.30	PTR	mail2.simplycast.com
64.50.155.30	A	webmail.franchiseasaservice.org
64.50.155.30	A	mail.franchiseasaservice.org
64.50.155.32	PTR	app5.simplycast.com
64.50.155.33	A+PTR	app6.simplycast.com
64.50.155.50	PTR	www2.simplycast.com
64.50.155.50	A	social-mailer.com
64.50.155.50	A	crm-optin.com
64.50.155.53	PTR	mail1.simplycast.com
64.50.155.125	A	64-50-155-125.client.dsl.net
64.50.155.158	PTR	app.scsend.net
64.50.156.2	A+PTR	na2.scsend.net
64.50.156.16	A+PTR	na16.scsend.net
64.50.156.26	A	na26.scsend.net
64.50.156.36	A	na36.scsend.net
64.50.156.39	A	na39.scsend.net
64.50.156.54	A	na54.scsend.net
64.50.156.66	A+PTR	na66.scsend.net
64.50.156.77	A	na77.scsend.net
64.50.156.91	A	na91.scsend.net
64.50.156.93	A	na93.scsend.net
64.50.156.94	A	na94.scsend.net
64.50.156.97	A+PTR	na97.scsend.net
64.50.156.102	A	na102.scsend.net
64.50.156.114	A+PTR	na114.scsend.net
64.50.156.116	A	na116.scsend.net
64.50.156.118	A	na118.scsend.net
64.50.156.121	A	na121.scsend.net
64.50.156.134	A	na134.scsend.net
64.50.156.142	A	na142.scsend.net
64.50.156.144	A+PTR	na144.scsend.net
64.50.156.146	A+PTR	na146.scsend.net
64.50.156.163	A+PTR	na163.scsend.net
64.50.156.167	A	na167.scsend.net
64.50.156.168	A	na168.scsend.net
64.50.156.179	A+PTR	na179.scsend.net
64.50.156.183	A	na183.scsend.net
64.50.156.192	A+PTR	na192.scsend.net
64.50.156.193	A+PTR	na193.scsend.net
64.50.156.194	A+PTR	na194.scsend.net
64.50.156.196	A	na196.scsend.net
64.50.156.208	A+PTR	na208.scsend.net
64.50.156.209	A+PTR	na209.scsend.net
64.50.156.210	A+PTR	na210.scsend.net
64.50.156.216	A	na216.scsend.net
64.50.156.228	A	na228.scsend.net
64.50.156.250	A	na250.scsend.net
64.50.157.152	A	nb152.scsend.net
64.50.157.193	A	nb193.scsend.net
64.50.158.116	A	nc116.scsend.net
64.50.159.23	A	nd23.scsend.net
64.50.159.99	A	nd99.scsend.net