Robtex

Up: 50.20.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 50.20.208.0/21
Down right: 50.20.216.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
50.20.208.6	A	mail01.mrwadvisory.com
50.20.209.58	A	mail.kirkwoodindustries.com
50.20.209.70	A	mail.nwbiomet.com
50.20.209.166	A+PTR	50-20-209-166.customerip.birch.net
50.20.210.2	A	mail.jshproperties.com
50.20.210.5	A	mail2.jshproperties.com
50.20.210.78	A+PTR	mail.aglow.org
50.20.210.82	A+PTR	mail.timeshareliquidationservice.com
50.20.210.82	A	mail.tlstimeshares.com
50.20.210.122	A	mail.seattlepacificmtg.com
50.20.211.158	A	gateway.rubensteins.com
50.20.211.230	PTR	mail.scarsellabros.com
50.20.211.230	PTR	mail2.scarsellabros.com
50.20.211.230	A+PTR	50-20-211-230.customerip.birch.net
50.20.212.14	A	mail.presscoproducts.com
50.20.212.18	PTR	remote.teknotherm-inc.com
50.20.212.30	PTR	mail.loefflerlegal.com
50.20.212.42	PTR	remote.lenz-enterprises.com
50.20.212.88	PTR	mail.npinfo.com
50.20.212.96	PTR	50-20-212-96.customerip.birch.net
50.20.212.96	A	thirdwavemgt.com
50.20.212.106	A+PTR	mail.innovac.com
50.20.212.106	A+PTR	remote.innovac.com
50.20.212.126	A	mail.adaptengr.com
50.20.212.130	A+PTR	mail.scarsellabros.com
50.20.212.130	A	mail2.scarsellabros.com
50.20.212.146	A	mail.iuec19.org
50.20.212.170	PTR	mail.aeamail.com
50.20.212.170	PTR	50-20-212-170.customerip.birch.net
50.20.212.170	A	aeamail.com
50.20.216.86	A	mail.flemingandsons.net
50.20.216.166	A+PTR	50-20-216-166.customerip.birch.net
50.20.216.166	A	webmail.calsupply.com
50.20.217.21	A+PTR	email.afrct.com
50.20.217.42	PTR	50-20-217-42.customerip.birch.net
50.20.217.42	PTR	mail.metesgroup.net.217.20.50.in-addr.arpa
50.20.217.42	A	mail.normandymtg.com
50.20.217.118	A+PTR	brightenfreight.com
50.20.217.172	A	d70.k12.il.us
50.20.218.86	A+PTR	fvbw-ex1.fvbodyworks.com
50.20.218.86	PTR	owa.fvbodyworks.com
50.20.218.86	A	fvbw-ex1.fountainvalleybodyworks.com
50.20.218.90	A+PTR	mail.fvbodyworks.com
50.20.218.90	A	mail.fountainvalleybodyworks.com
50.20.218.162	A+PTR	mail.ocada.org
50.20.218.170	A	mail.oms-llc.com
50.20.218.218	A+PTR	smtp.lobstersports.com
50.20.218.218	A	mail.lobstersports.com
50.20.219.90	A	mail.brownpacific.com
50.20.219.100	A	smtp.jgc.co
50.20.219.100	A	jgmail.jgconstruction.com
50.20.219.100	A	jgmail.jgserviceco.com
50.20.219.102	A	*.jgserviceco.com
50.20.219.198	PTR	mail.parkwestgc.com
50.20.219.198	PTR	remote.parkwestgc.com
50.20.219.198	A+PTR	50-20-219-198.customerip.birch.net
50.20.219.230	A+PTR	50-20-219-230.customerip.birch.net
50.20.219.230	A	craftworldcorp.com
50.20.220.52	PTR	smtp.ultrapro.com
50.20.220.52	PTR	50-20-220-52.customerip.birch.net
50.20.220.122	PTR	hralternatives.com
50.20.220.122	A	mail.hralternatives.com
50.20.220.206	PTR	mail.hanminc.com
50.20.220.206	A+PTR	50-20-220-206.customerip.birch.net
50.20.220.206	A	www.pennysave.com
50.20.220.231	A+PTR	50-20-220-231.customerip.birch.net
50.20.220.231	A	www.ibps.org
50.20.220.231	A	ibps.org
50.20.220.232	A	www.hsilai.org
50.20.220.233	PTR	50-20-220-233.customerip.birch.net
50.20.221.132	A	mail.brightenlending.com
50.20.221.238	A	mail.ruiztortillas.net
50.20.222.190	A+PTR	mail2.livingwaters.com
50.20.222.190	A+PTR	50-20-222-190.customerip.birch.net
50.20.222.242	A	handbagrepublic.com
50.20.223.150	A	mail.palpilotsc.com
50.20.223.150	A	smtp.palpilotsc.com
50.20.223.178	PTR	50-20-223-178.customerip.birch.net
50.20.223.179	A	ppro.davalansales.com
50.20.223.181	A	mail.davalansales.com