Robtex

Up: 64.122.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.122.40.0/22
Down right: 64.122.44.0/22

IP	Type	Hostname
64.122.40.55	A+PTR	debianetch.portlandfp.com
64.122.40.86	PTR	mail.discorporate.us
64.122.40.144	PTR	mail.t-a-inc.com
64.122.40.235	PTR	mail.pickettlaw.com
64.122.41.71	A	mail.deschutesadvisors.com
64.122.41.237	PTR	deltakits.com
64.122.42.9	A	mail.tmfab.com
64.122.42.56	A	cust-64-122-42-56.integraonline.com
64.122.42.57	A	cust-64-122-42-57.integraonline.com
64.122.42.58	PTR	mail.nwfire.com
64.122.42.59	A	cust-64-122-42-59.integraonline.com
64.122.42.60	A	cust-64-122-42-60.integraonline.com
64.122.42.86	PTR	mail.lenzfinancial.com
64.122.42.91	PTR	mail.vgmhc.org
64.122.42.154	PTR	mail.bannerfurnitureoutlet.com
64.122.42.181	PTR	polaris.lithtex.com
64.122.42.202	A+PTR	mail.clearedgepower.com
64.122.43.10	A	mail.sunhorizonspecialized.com
64.122.43.11	A	mail.harvesttransport.com
64.122.43.98	PTR	mail.pacpaperinc.com
64.122.43.98	A	mail.pacpaperinc.net
64.122.43.178	PTR	mail.tntsoftware.com
64.122.43.179	A	wonderlama.com
64.122.44.26	PTR	mail.majesticeagle.com
64.122.44.126	A	mail.forestmed.com
64.122.44.222	A+PTR	mail.kbvm.fm
64.122.44.222	A	mail.kbvm.com
64.122.45.238	A	mail.bread.com
64.122.46.22	PTR	pacfour.com
64.122.46.68	PTR	co-operations.com
64.122.46.98	A	mail.mthoodcleaners.com
64.122.46.99	PTR	ns2.portline.net
64.122.46.112	A	help.sprbrk.com
64.122.46.213	PTR	email-server.changepointinc.com
64.122.46.236	PTR	nwcapital.com
64.122.46.246	A	mail.kevinkanedo.com
64.122.47.78	A	office.reddenfindling.com
64.122.47.86	A	ioremote.pearsonfinancial.com
64.122.47.86	A	iomail.pearsonfinancial.com
64.122.47.242	PTR	fluent-speech.com