Robtex

Up: 192.86.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.86.51.0/25
Down right: 192.86.51.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.86.51.1	A+PTR	news.sagepub.com
192.86.51.2	A+PTR	news.sagepub.co.uk
192.86.51.3	A+PTR	news.corwin.com
192.86.51.4	A+PTR	inform.pli.edu
192.86.51.5	PTR	news.cqpress.com
192.86.51.6	A+PTR	medtroniccommunications.com
192.86.51.7	A	email.thrivent.com
192.86.51.8	A+PTR	sccmheadquarters.org
192.86.51.9	A+PTR	replies-us.unicaondemand.com
192.86.51.12	A+PTR	mailama.org
192.86.51.15	A	email.americafirst.com
192.86.51.16	A+PTR	email.keysight.com
192.86.51.16	A	emsg16.enews.agilent.com
192.86.51.17	A+PTR	emessenger.cisco.com
192.86.51.18	PTR	emsg18.info.denmat.com
192.86.51.18	A	info.denmat.com
192.86.51.20	A	email.homemakers.com
192.86.51.29	A	loja.vivo.com.br
192.86.51.34	A	email.moviestop.com
192.86.51.38	A+PTR	confirmation.pli.edu
192.86.51.40	A+PTR	emsg40.petrescuers.homeagain.com
192.86.51.40	A	petrescuers.homeagain.com
192.86.51.41	PTR	emsg41.email.homeagain.com
192.86.51.41	A	email.mypet.com
192.86.51.41	A	email.homeagain.com
192.86.51.42	PTR	emsg42.servicing.homeagain.com
192.86.51.42	A	servicing.homeagain.com
192.86.51.46	A+PTR	email.universalorlando.com
192.86.51.50	PTR	emsg50.info.centocororthobiotech.com
192.86.51.50	A	info.centocororthobiotech.com
192.86.51.53	PTR	emsg53.info.janssenbiotech.com
192.86.51.53	A	info.janssenbiotech.com
192.86.51.55	A	email.merckahpartners.com
192.86.51.60	A+PTR	custcomm.icicibank.com
192.86.51.60	A	emsg60.e.musicarts.com
192.86.51.70	A+PTR	emsg70.email2.mycollegeoptions.org
192.86.51.70	A	email2.mycollegeoptions.org
192.86.51.76	PTR	emsg76.email2.nrccua.org
192.86.51.76	A	email2.nrccua.org
192.86.51.78	A+PTR	emails.thomsonreuters.biz
192.86.51.80	A	email.mycollegeoptions.net
192.86.51.82	A	bayerdcemail.com
192.86.51.83	A	offers.cathaypacific.com
192.86.51.84	A	offers.dragonair.com
192.86.51.88	A+PTR	site01.ascpmail.org
192.86.51.89	A+PTR	emsg89.emessenger.cisco.com
192.86.51.90	A+PTR	smtp1.lifetech-email.com
192.86.51.91	A+PTR	web.universalorlando.com
192.86.51.92	PTR	email.b0.monster.com
192.86.51.92	A	email.e0.careerone.com.au
192.86.51.92	A	email.tm.monster.com
192.86.51.93	A+PTR	smtp1.email.b0.monster.com
192.86.51.100	PTR	smtp8.email.b0.monster.com
192.86.51.101	PTR	smtp9.email.b0.monster.com
192.86.51.103	PTR	smtp11.email.b0.monster.com
192.86.51.136	A+PTR	email.activyl.com
192.86.51.137	A+PTR	comunicado.natura.net
192.86.51.141	A	mail.cinemex.com
192.86.51.146	A+PTR	oportunidades.natura.net
192.86.51.147	A+PTR	info.natura.net
192.86.51.150	A+PTR	news.disneylatam.com