Robtex

Up: 206.217.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 206.217.64.0/20
Down right: 206.217.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.217.64.2	A	smtp1.seegerweiss.com
206.217.64.241	A	smtp3.seegerweiss.com
206.217.64.254	A	mailout2.seegerweiss.com
206.217.65.32	PTR	32-65.217.206.static.cosmoweb.net
206.217.65.147	A	mail.radius-global.com
206.217.67.66	A	ns3.vidashoes.net
206.217.67.99	PTR	99-67-217-206.static.cosmoweb.net
206.217.67.106	A	*.handbaldachin.com
206.217.67.108	A	mail.hballp.com
206.217.67.108	A	mail.handbaldachin.com
206.217.67.228	A	rocrusso.com
206.217.67.228	A	roccorusso.com
206.217.68.139	A	smtp2.triallaw1.com
206.217.68.194	A	ns3.agtri.com
206.217.69.174	A	mail.connexinsoftware.com
206.217.70.111	A	*.watersideproduction.com
206.217.70.111	A	www.watersideproduction.com
206.217.70.119	A	vespertineshop.com
206.217.72.2	PTR	mail.faccnyc.org
206.217.72.2	A	mail2.faccnyc.org
206.217.72.16	A	krellerdd.com
206.217.72.16	A	krellercreditreports.com
206.217.72.122	A	clearviewtrading.com
206.217.72.124	A	mail.clearviewtrading.com
206.217.72.124	A	clearviewtradingmail.com
206.217.72.139	A	mx1.fusionbrandsinc.com
206.217.72.139	A	mail.fusionbrandsinc.com
206.217.72.162	A	ns2.dreamwearinc.net
206.217.72.194	A	lipman-nyc.biz
206.217.72.194	A	lipman-nyc.org
206.217.73.165	A	mail.mas.org
206.217.73.226	A+PTR	mail.weissandco.com
206.217.73.226	A	mail.majorncorp.com
206.217.73.226	A	mail.datanetsystems.com
206.217.76.21	A	mail.unclesamdiamonds.com
206.217.76.98	PTR	98-76-217-206.static.cosmoweb.net
206.217.76.124	A	webmail.alliancebuildingservices.com
206.217.76.126	A	mail.alliancebuildingservices.com
206.217.76.126	A	smtp1.alliancebuildingservices.com
206.217.77.34	A	mail.septrivium.com
206.217.77.34	A	mail.backupmydataonline.net
206.217.77.34	A	mail.mesnllc.com
206.217.77.67	A	email.iib.org
206.217.77.228	A	mail.sterlingoptical.com
206.217.77.228	A	mail.insightmanagedcare.com
206.217.77.228	A	mail.siteforsoreeyes.com
206.217.78.77	A	htmail1.hartan.com
206.217.78.130	A	mail.spandrelgroup.com
206.217.78.130	A	mail.spandrelproperty.com
206.217.78.130	A	mail.cdany.com
206.217.78.217	A	illbedetermined.com
206.217.78.243	A	gmail.gersongroup.com
206.217.79.178	A	rokkabilly.com
206.217.79.235	A	mail.abt.org
206.217.81.66	A	mail.energygroupinc.com
206.217.81.66	A	*.energygroupinc.com
206.217.81.66	A	energygroupinc.com
206.217.82.6	A	xwingtechnologies.com
206.217.82.6	A	stratvestfinancial.com
206.217.82.64	PTR	64-82-217-206.static.cosmoweb.net
206.217.82.65	PTR	65-82-217-206.static.cosmoweb.net
206.217.82.161	PTR	161-82-217-206.static.cosmoweb.net
206.217.82.162	PTR	162-82-217-206.static.cosmoweb.net
206.217.82.226	PTR	226-82-217-206.static.cosmoweb.net
206.217.83.130	PTR	work130.dataclonemail.com
206.217.83.130	A	mailbag.dataclonemail.com
206.217.83.141	A	adlitics.com
206.217.83.141	A	www.ptmzr.com
206.217.83.141	A	ptmzr.com
206.217.85.180	A	westmidtownmedical.com
206.217.85.195	A	mail.skylightnyc.com
206.217.85.202	A	mail.invemed.com
206.217.85.243	A	bocca.gbglaw.com
206.217.85.250	A	murgler.org
206.217.85.250	A	mail.murgler.org
206.217.87.32	PTR	32-87-217-206.static.cosmoweb.net
206.217.87.34	PTR	34-87-217-206.static.cosmoweb.net
206.217.87.65	PTR	65-87-217-206.static.cosmoweb.net
206.217.87.125	A	coopercreekpartners.com
206.217.87.131	PTR	131-87-217-206.static.cosmoweb.net
206.217.87.162	PTR	162-87-217-206.static.cosmoweb.net
206.217.88.99	A	mail.centrelanepartners.com
206.217.88.99	A	mail.centre-lane.com
206.217.88.99	A	centre-lane.com
206.217.88.129	PTR	129-88-217-206.static.cosmoweb.net
206.217.90.98	A	mail.manageforms.com
206.217.91.2	PTR	email.observer.com
206.217.92.126	A	jw-mail.williamsnyc.com
206.217.93.35	PTR	mail.mtouton.com
206.217.93.51	A	mail.photoresearchers.com
206.217.93.57	A	images.sciencesource.com
206.217.93.58	A	image.sciencesource.com
206.217.93.89	A	mail2.columbusnova.com
206.217.93.94	A	mail2.renovausa.com
206.217.93.168	A	spam.adjmi-apparel.com
206.217.94.1	PTR	transbeam.cami.com
206.217.94.2	PTR	h2.cami.com
206.217.94.6	A	mail.camimusic.com
206.217.94.18	A	ns0.cami.com
206.217.94.18	A	ns2.cami.com
206.217.94.18	A	hairball.cami.com
206.217.94.23	A	ns0.cami.com
206.217.94.23	A	hairball.cami.com
206.217.94.67	PTR	67-94-217-206.static.cosmoweb.net
206.217.94.67	A	solvedallc.com
206.217.94.67	A	solvedaindia.com
206.217.94.103	A	lvcint.com
206.217.94.195	PTR	195-94-217-206.static.cosmoweb.net
206.217.94.195	A	isawny.com
206.217.95.27	A	mail.wkgj.com
206.217.95.64	PTR	64-95-217-206.static.cosmoweb.net
206.217.95.66	PTR	66-95-217-206.static.cosmoweb.net