Robtex

Up: 209.50.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 209.50.160.0/20
Down right: 209.50.176.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.50.161.84	A	mail-t1.buonavitainc.com
209.50.162.2	PTR	mail.adhusa.com
209.50.162.81	PTR	electronenergy.com
209.50.162.82	PTR	electronenergy.com
209.50.162.83	PTR	electronenergy.com
209.50.162.84	PTR	electronenergy.com
209.50.162.186	PTR	airconvey.com
209.50.162.227	PTR	mail.jsmcmanus.com
209.50.162.249	PTR	mkorshalom.org
209.50.164.1	PTR	www.mjm.com
209.50.164.12	PTR	ns2.mjm.com
209.50.164.13	PTR	ns1.mjm.com
209.50.165.25	PTR	cbalincroftnj.org
209.50.165.26	PTR	cbalincroftnj.org
209.50.165.158	PTR	spam1.petraweb.com
209.50.167.72	PTR	caldwellkearns.com
209.50.167.73	PTR	caldwellkearns.com
209.50.167.74	PTR	caldwellkearns.com
209.50.167.75	PTR	caldwellkearns.com
209.50.167.146	A+PTR	mail.analyticaltechnology.com
209.50.167.171	A	trcwebsite.com
209.50.170.123	PTR	mail.scheufelenna.com
209.50.171.2	PTR	bedminster.trumpnational.com
209.50.171.70	A+PTR	ns1.auth.atx.net
209.50.171.73	A+PTR	cvs.auth.atx.net
209.50.171.76	A	ns2.auth.atx.net
209.50.171.77	A	smtpgate.atx.net
209.50.171.78	A	smtpgate.atx.net
209.50.171.79	A	smtpgate.atx.net
209.50.172.3	PTR	mail.uscnet.com
209.50.172.12	PTR	mail.uscnet.com
209.50.173.34	PTR	mail2.simx.com
209.50.173.35	PTR	static-209-50-173-35.isp.broadviewnet.net
209.50.173.36	PTR	ccr.coriell.org
209.50.173.36	A	locus.umdnj.edu
209.50.173.126	PTR	php.onqlegrand.com
209.50.174.115	A+PTR	mail1.cunj.org
209.50.174.130	A	mail.healthyblackwomen.org
209.50.174.210	A	mail2.jdsw.com
209.50.174.230	PTR	www.par.net
209.50.174.251	A	mx1.par.net
209.50.175.90	PTR	mail.costarihl.com
209.50.175.154	PTR	mail.mjhassoc.com
209.50.175.210	A+PTR	mail.neagri.com
209.50.175.210	A	webmail.neagri.com
209.50.176.66	PTR	mail.coadgroup.com
209.50.176.115	PTR	www.accumepartners.com
209.50.176.115	A	accumepartners.net
209.50.176.115	A	www.accume-partners.net
209.50.178.74	PTR	mail.catex.com
209.50.178.74	A	webmail.catex.com
209.50.179.130	A	hosted.voipnetworks.com
209.50.179.132	A+PTR	mail4.voipnetworks.com
209.50.179.139	A	mail2.wwis.com
209.50.179.139	A	mail1.voipnetworks.com
209.50.179.194	A	mail.magsc.org
209.50.179.236	PTR	webmail.pinnacle.us.com
209.50.180.0	PTR	cecilcc.edu
209.50.180.1	PTR	cecilcc.edu
209.50.180.32	PTR	cecilcc.edu
209.50.180.33	PTR	cecilcc.edu
209.50.180.65	PTR	cecilcc.edu
209.50.180.96	PTR	cecilcc.edu
209.50.180.99	PTR	cecilcc.edu
209.50.180.130	PTR	cecilcc.edu
209.50.180.131	PTR	cecilcc.edu
209.50.180.163	PTR	cecilcc.edu
209.50.180.193	PTR	cecilcc.edu
209.50.180.224	PTR	cecilcc.edu
209.50.180.227	PTR	cecilcc.edu
209.50.181.6	A	acm-dc6.com
209.50.181.19	A	mail2.acmsys.com
209.50.181.28	A	acm-dc6b.com
209.50.181.35	A	primhits.com
209.50.181.59	A	www.primweb.com
209.50.181.59	A	primweb.com
209.50.181.70	A	acm-dc7.com
209.50.181.100	A	mail.wahmart.com
209.50.181.100	A	fashions4kids.com
209.50.181.100	A	granolathreads.com
209.50.181.213	A	acm-dc3b.com
209.50.181.240	PTR	mail.acmsys.com
209.50.181.240	A	mail.luluandjunebug.com
209.50.181.240	A	mail.cmichaelcottage.com.au
209.50.181.241	PTR	mail.acmsys.com
209.50.185.22	PTR	mail.swedesboro-woolwich.com
209.50.185.107	PTR	rob1.ccllabel.com
209.50.185.138	PTR	conservgrp.com
209.50.185.139	PTR	conservgrp.com
209.50.185.244	PTR	us1-relay.invmed.com
209.50.186.42	PTR	mail.iciflooring.com
209.50.186.67	A	mail3.mark-itservices.com
209.50.187.2	PTR	outbound.thermomegatech.com
209.50.188.36	A	mail.chinookwireless.net
209.50.188.44	A	sms.chinookwireless.com
209.50.188.50	A	chinookwireless.net
209.50.188.216	A	ci.bridgeport.ct.us
209.50.189.25	A	voip.atx.net
209.50.189.193	A	atx-feed1-phl.tacoda.net
209.50.189.194	A	phl-fw1.tacoda.net
209.50.189.195	A	phl-fw2.tacoda.net
209.50.189.196	A	bogus.tacoda.net
209.50.189.252	A	nsc-phl.tacoda.net
209.50.189.253	A	phl-lb2.tacoda.net
209.50.189.254	A	phl-lb1.tacoda.net
209.50.191.217	PTR	healthatoz.com
209.50.191.218	PTR	healthatoz.com
209.50.191.219	PTR	healthatoz.com
209.50.191.220	PTR	healthatoz.com
209.50.191.226	A	smtp.baltimore.org