Robtex

Up: 64.98.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 64.98.32.0/21
Down right: 64.98.40.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.98.32.1	PTR	b001.b.tucows.com
64.98.32.2	A+PTR	b002.b.tucows.com
64.98.32.17	A+PTR	b017.b.tucows.com
64.98.32.24	A	b024.b.tucows.com
64.98.36.4	PTR	mx.b.hostedemail.com
64.98.36.4	A	mx.firstimpr.com.cust.b.hostedemail.com
64.98.36.4	A	mx.dgsolutioncinc.com.cust.b.hostedemail.com
64.98.36.5	PTR	mail.b.hostedemail.com
64.98.36.6	PTR	admin.b.hostedemail.com
64.98.36.7	PTR	64-98-36-7.rev.tucows.net
64.98.36.17	A+PTR	forward.b.hostedemail.com
64.98.36.29	PTR	forward004.b.hostedemail.com
64.98.36.113	A+PTR	smtprelay113.netins.net
64.98.36.126	A+PTR	mail.perfectaddress.com
64.98.36.128	PTR	mail.b.hostedemail.com
64.98.36.128	A	mail.seeitsendit.com
64.98.36.128	A	mail.lanierphotography.com
64.98.36.131	PTR	64-98-36-131.rev.tucows.net
64.98.36.144	PTR	webmail.lycos.com.au
64.98.36.145	A+PTR	webmail.lycos.co.uk
64.98.36.145	A	mail.lycos.co.uk.cust.b.hostedemail.com
64.98.36.146	A+PTR	mail.yellowinteractive.co.nz
64.98.36.146	A	mail.yellowinteractive.co.nz.cust.b.hostedemail.com
64.98.36.147	PTR	mail.noip.com
64.98.36.160	A	mail.viwebs.com
64.98.36.162	PTR	mail.userservices.net
64.98.36.162	A	mail-cnyti.userservices.net
64.98.36.162	A	mail.wnynet.net
64.98.36.163	PTR	msg.dcwis.com
64.98.36.165	PTR	webmail01.mycorphosting.com
64.98.36.176	PTR	mail.yourwebsitemail.com
64.98.36.176	A	mail.leesburg1stdental.com
64.98.36.176	A	mail.cortedental.com
64.98.36.179	PTR	wildcard.conwaycorp.net
64.98.36.180	PTR	wildcard.vastbb.net
64.98.36.181	PTR	mail.summergrove.net
64.98.36.193	PTR	mail.ufn.com
64.98.36.194	PTR	mail.yolamail.com
64.98.36.194	A	mail.yolamail.com.cust.b.hostedemail.com
64.98.36.198	PTR	india.b.hostedemail.com
64.98.36.198	A	bizsense.in.ms.clusterb.ilxmail.net
64.98.36.198	A	mail.paraseals.com
64.98.36.213	A+PTR	webmail.atlashosting.com
64.98.36.213	A	mail.shutheatrearts.org
64.98.36.213	A	mail.ultraradio.com
64.98.36.218	PTR	mail.wyan.org
64.98.36.219	PTR	mail.hostbaby.com
64.98.36.221	PTR	mail.mtmemail.com
64.98.36.233	PTR	mail.viscom.net
64.98.36.233	A	mail.viscom.net.cust.b.hostedemail.com
64.98.36.234	PTR	mail.eatel.net
64.98.36.234	A	mail.eatel.net.cust.b.hostedemail.com
64.98.36.237	PTR	mail.widomaker.com
64.98.36.237	A	mail.widomaker.com.cust.b.hostedemail.com
64.98.36.238	PTR	mail.cruzio.com
64.98.36.238	A	mail.cruzio.com.cust.b.hostedemail.com
64.98.36.251	PTR	email.isoc.net
64.98.36.251	A	mail.isoc.net.cust.b.hostedemail.com
64.98.42.1	A+PTR	smtprelay0001.b.hostedemail.com
64.98.42.2	A+PTR	smtprelay0002.b.hostedemail.com
64.98.42.3	A+PTR	smtprelay0003.b.hostedemail.com
64.98.42.4	PTR	smtprelay0004.b.hostedemail.com
64.98.42.5	A	smtprelay0005.b.hostedemail.com
64.98.42.16	A+PTR	smtprelay0016.b.hostedemail.com
64.98.42.17	A+PTR	smtprelay0017.b.hostedemail.com
64.98.42.18	A+PTR	smtprelay0018.b.hostedemail.com
64.98.42.19	A+PTR	smtprelay0019.b.hostedemail.com
64.98.42.32	A+PTR	smtprelay0032.b.hostedemail.com
64.98.42.33	A+PTR	smtprelay0033.b.hostedemail.com
64.98.42.34	A+PTR	smtprelay0034.b.hostedemail.com
64.98.42.35	A+PTR	smtprelay0035.b.hostedemail.com
64.98.42.48	A+PTR	smtprelay0048.b.hostedemail.com
64.98.42.49	A+PTR	smtprelay0049.b.hostedemail.com
64.98.42.50	A+PTR	smtprelay0050.b.hostedemail.com
64.98.42.51	A+PTR	smtprelay0051.b.hostedemail.com
64.98.42.64	A+PTR	smtprelay0064.b.hostedemail.com
64.98.42.65	A+PTR	smtprelay0065.b.hostedemail.com
64.98.42.66	A	smtprelay0066.b.hostedemail.com
64.98.42.67	A	smtprelay0067.b.hostedemail.com
64.98.42.80	A+PTR	smtprelay0080.b.hostedemail.com
64.98.42.82	A+PTR	smtprelay0082.b.hostedemail.com
64.98.42.83	PTR	smtprelay0083.b.hostedemail.com
64.98.42.84	A	smtprelay0084.b.hostedemail.com
64.98.42.85	A	smtprelay0085.b.hostedemail.com
64.98.42.96	PTR	smtprelay0096.b.hostedemail.com
64.98.42.97	A	smtprelay0097.b.hostedemail.com
64.98.42.98	A+PTR	smtprelay0098.b.hostedemail.com
64.98.42.99	A+PTR	smtprelay0099.b.hostedemail.com
64.98.42.100	A	smtprelay0100.b.hostedemail.com
64.98.42.113	A+PTR	smtprelay0113.b.hostedemail.com
64.98.42.114	PTR	smtprelay0114.b.hostedemail.com
64.98.42.115	A+PTR	smtprelay0115.b.hostedemail.com
64.98.42.116	A	smtprelay0116.b.hostedemail.com
64.98.42.118	A	smtprelay0118.b.hostedemail.com
64.98.42.128	PTR	smtprelay0128.b.hostedemail.com
64.98.42.130	PTR	smtprelay0130.b.hostedemail.com
64.98.42.131	A+PTR	smtprelay0131.b.hostedemail.com
64.98.42.132	A	smtprelay0132.b.hostedemail.com
64.98.42.133	A	smtprelay0133.b.hostedemail.com
64.98.42.134	A	smtprelay0134.b.hostedemail.com
64.98.42.144	PTR	smtprelay0144.b.hostedemail.com
64.98.42.147	A+PTR	smtprelay0147.b.hostedemail.com
64.98.42.148	A	smtprelay0148.b.hostedemail.com
64.98.42.151	A	smtprelay0151.b.hostedemail.com
64.98.42.152	A	smtprelay0152.b.hostedemail.com
64.98.42.160	A+PTR	smtprelay0160.b.hostedemail.com
64.98.42.163	A+PTR	smtprelay0163.b.hostedemail.com
64.98.42.164	A	smtprelay0164.b.hostedemail.com
64.98.42.168	A	smtprelay0168.b.hostedemail.com
64.98.42.177	A+PTR	smtprelay0177.b.hostedemail.com
64.98.42.180	A	smtprelay0180.b.hostedemail.com
64.98.42.181	A	smtprelay0181.b.hostedemail.com
64.98.42.183	A	smtprelay0183.b.hostedemail.com
64.98.42.193	PTR	smtprelay0193.b.hostedemail.com
64.98.42.195	A+PTR	smtprelay0195.b.hostedemail.com
64.98.42.196	A	smtprelay0196.b.hostedemail.com
64.98.42.198	A	smtprelay0198.b.hostedemail.com
64.98.42.199	A	smtprelay0199.b.hostedemail.com
64.98.42.208	A+PTR	smtprelay0208.b.hostedemail.com
64.98.42.209	A+PTR	smtprelay0209.b.hostedemail.com
64.98.42.210	A+PTR	smtprelay0210.b.hostedemail.com
64.98.42.211	A+PTR	smtprelay0211.b.hostedemail.com
64.98.42.224	A+PTR	smtprelay0224.b.hostedemail.com
64.98.42.225	A+PTR	smtprelay0225.b.hostedemail.com
64.98.42.226	A+PTR	smtprelay0226.b.hostedemail.com
64.98.42.227	A+PTR	smtprelay0227.b.hostedemail.com
64.98.42.240	A+PTR	smtprelay0240.b.hostedemail.com
64.98.42.241	A+PTR	smtprelay0241.b.hostedemail.com
64.98.42.242	A+PTR	smtprelay0242.b.hostedemail.com
64.98.42.243	A+PTR	smtprelay0243.b.hostedemail.com