Robtex

Up: 208.86.202.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 208.86.203.0/25
Down right: 208.86.203.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.86.203.12	PTR	208-86-203-0.proofpoint.com
208.86.203.12	A	smtp.companyassociate.com
208.86.203.12	A	smtp.bbphotoandframe.com
208.86.203.13	PTR	208-86-203-0.proofpoint.com
208.86.203.13	A	smtp.proofline.net
208.86.203.13	A	smtp.lleprince.net
208.86.203.15	A	cupquest.net
208.86.203.15	A	mx1-pps.cupquest.net
208.86.203.17	A	dlowe.se.proofpoint.com
208.86.203.18	A	rdavis.se.proofpoint.com
208.86.203.25	PTR	208-86-203-0.proofpoint.com
208.86.203.25	A	smtp.se.proofpoint.com
208.86.203.31	A	smtp.bcollar.se.proofpoint.com
208.86.203.31	A	bcollar.se.proofpoint.com
208.86.203.42	A	rcoulter.se.proofpoint.com
208.86.203.46	A	mail.allthingsoffice365.com
208.86.203.56	A	duanderson.se.proofpoint.com
208.86.203.60	A	mail.ramnauth.net
208.86.203.70	A	smtp.cascade36.com
208.86.203.73	A	mx1.gmandelstam.net
208.86.203.73	A	smtp.jdeshaies.se.proofpoint.com
208.86.203.73	A	jdeshaies.se.proofpoint.com
208.86.203.74	A	siasillo.se.proofpoint.com
208.86.203.74	A	smtp.siasillo.se.proofpoint.com
208.86.203.81	A	pps.no-more-spam.com
208.86.203.82	A	dkitt.se.proofpoint.com
208.86.203.82	A	pps.kittservices.com
208.86.203.85	A	mblackhurst.se.proofpoint.com
208.86.203.87	PTR	208-86-203-0.proofpoint.com
208.86.203.87	A	pfptpentest.com
208.86.203.87	A	email.pfptpentest.com
208.86.203.101	PTR	208-86-203-0.proofpoint.com
208.86.203.101	A	se.proofpoint.com
208.86.203.109	PTR	208-86-203-0.proofpoint.com
208.86.203.109	A	aroman.se.proofpoint.com
208.86.203.109	A	smtp.aroman.se.proofpoint.com
208.86.203.115	A	seg.cmlawrence.com
208.86.203.115	A	clawrence.se.proofpoint.com
208.86.203.115	A	smtp.clawrence.se.proofpoint.com
208.86.203.123	A	secure.darkethereal.com
208.86.203.177	PTR	208-86-203-0.proofpoint.com
208.86.203.197	A	smtp.now-defender.com
208.86.203.210	A	hendrix-1.proofpointdemo.com
208.86.203.220	PTR	208-86-203-0.proofpoint.com
208.86.203.224	PTR	208-86-203-0.proofpoint.com
208.86.203.224	A	demo-share1.proofpointdemo.com
208.86.203.228	PTR	208-86-203-0.proofpoint.com
208.86.203.243	A	ptmaster.proofpointdemo.com
208.86.203.251	A	ptrdemo.com
208.86.203.255	PTR	208-86-203-0.proofpoint.com