Robtex

Up: 198.231.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 198.231.0.0/18
Down right: 198.231.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.231.6.32	PTR	gtm2.ribob01.net
198.231.9.20	A+PTR	access.plt-test00.com
198.231.9.25	A	lyncav.pltbluesky.com
198.231.10.13	A+PTR	ftp.plantronics.com
198.231.10.15	A+PTR	mail2.plantronics.com
198.231.10.16	A+PTR	ns1.plantronics.com
198.231.10.19	A	plantronics.com
198.231.10.128	A	plantronicsexplorer.com
198.231.10.128	A	plantronics-wireless.com
198.231.10.128	A	plantronicssmartlock.com
198.231.10.133	PTR	usscweb31.plantronics.com
198.231.11.51	A+PTR	sip.plantronics.com
198.231.12.33	A+PTR	mail5.plantronics.com
198.231.12.34	A+PTR	mail6.plantronics.com
198.231.14.36	A	mysiemensevents.com
198.231.14.38	A	concertocloud.com
198.231.14.38	A	www.concertocloud.com
198.231.14.52	A	ngcbitrust.org
198.231.14.128	A	fivewishesonline.agingwithdignity.org
198.231.14.235	A	agingwithdignity.org
198.231.14.246	A	dispatch.mdsiinc.com
198.231.14.246	A	webfarm.mdsiinc.com
198.231.15.28	A	buddysvpn.com
198.231.15.55	A	mail.cslab5.us
198.231.15.67	A	www.traderit.net
198.231.15.69	A	trailerfleetsolutions.com
198.231.15.111	A	fieldpointonline.com
198.231.15.130	A	salesbeast.com
198.231.15.147	A	fieldpointonline.com
198.231.15.152	A	emsilearn.com
198.231.15.152	A	natg.intelladon.com
198.231.23.1	A+PTR	dfwfw.pbsg.com
198.231.23.68	A+PTR	dfwgwfw1.pbsg.com
198.231.23.104	A	dfwsrv01.pbsg.com
198.231.23.113	A	mail001.pbsg.com
198.231.23.133	A	dfwns00.pbsg.com
198.231.23.141	PTR	sva01.pbsg.com
198.231.23.164	PTR	www.mypepsico.com
198.231.23.165	PTR	myaccess.mypepsico.com
198.231.24.1	A	cscfw.pbsg.com
198.231.24.68	A	cscfwgw1.pbsg.com
198.231.24.140	A	sva01.pbsg.com
198.231.24.168	PTR	webmail.pbg.com
198.231.27.10	A	vpn-us.varonis.com
198.231.27.38	A	support.varonis.com
198.231.27.59	A	id.varonis.com
198.231.27.108	A	dn-demo.com
198.231.27.194	A	sip-external-us.varonis.com
198.231.27.197	A	sip-external-us.varonis.com
198.231.28.7	A	ns1.gowisper.com
198.231.28.8	A	ns2.gowisper.com
198.231.28.9	A	mail.macedoniabaptistchurch.us
198.231.28.39	A	mail.gowisper.com
198.231.28.155	A	macedoniabaptistchurch.us
198.231.29.12	A	r1---sn-pgpnoxufvg3n-co5e.gvt1.com
198.231.29.12	A	r1---sn-pgpnoxufvg3n-co5e.googlevideo.com
198.231.29.12	A	r1.sn-pgpnoxufvg3n-co5e.gvt1.com
198.231.29.13	A	r2.sn-pgpnoxufvg3n-co5e.googlevideo.com
198.231.30.50	A	speedtest.irisharbor.com
198.231.30.82	A	occ-0-1402-987.1.nflxso.net
198.231.30.82	A	occ-0-1402-990.1.nflxso.net
198.231.30.82	A	occ-1-1402-987.1.nflxso.net
198.231.30.145	A	scontent.fcha1-1.fna.fbcdn.net
198.231.30.146	A	video.fcha1-1.fna.fbcdn.net
198.231.30.161	A	instagram.fcha1-1.fna.fbcdn.net
198.231.69.19	A	www.reclaim-direct.co.uk
198.231.86.190	A	sog.mx
198.231.94.88	A	tplbdc.tpl.toronto.on.ca