Robtex

Up: 203.239.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 203.239.0.0/18
Down right: 203.239.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.239.3.250	PTR	mail.hmsinc.co.kr
203.239.3.250	A	hmsinc.co.kr
203.239.6.1	PTR	mail.buyersguide.co.kr
203.239.6.1	A	mail.buykorea21.com
203.239.6.1	A	bg21.co.kr
203.239.7.0	A	kscfc.com
203.239.7.2	A	ns.kscfc.com
203.239.7.2	A	ns.kscfc.co.kr
203.239.7.10	A	www.kscfc.co.kr
203.239.12.204	PTR	proxy.di.co.kr
203.239.12.205	PTR	proxy1.di.co.kr
203.239.17.20	PTR	ns1.haansoft.com
203.239.17.200	PTR	thinkfree.com
203.239.24.221	PTR	noria.co.kr
203.239.24.221	PTR	mail.noria.co.kr
203.239.26.131	A+PTR	mail.susungtech.co.kr
203.239.26.131	A	mail.susunggn.com
203.239.28.2	A	bio6.net
203.239.28.5	A	bioexistence.com
203.239.28.5	A	biopaper.org
203.239.28.5	A	asiangenomereference.net
203.239.31.229	A	kmsg.co.kr
203.239.31.230	A	ns1.kmec.co.kr
203.239.32.21	A	tauseefcomputershop.com
203.239.34.11	A	kyobotrade.co.kr
203.239.34.11	A	kyobotrade.com
203.239.34.11	A	www.iprovest.com
203.239.34.21	A	tauseefcomputershop.com
203.239.36.21	A	tauseefcomputershop.com
203.239.38.21	A	tauseefcomputershop.com
203.239.40.38	A	www.075.pe.kr
203.239.40.228	A	moa1000.co.kr
203.239.43.21	A	aphrosys.com
203.239.44.40	A	design-k.kr
203.239.44.40	A	mail.hobin.me
203.239.44.40	A	design-k.co
203.239.44.75	A	ns1.approkorea.com
203.239.45.68	A	mail.hufkorea.com
203.239.45.148	A	astersoft.co.kr
203.239.45.182	A	gworange.com
203.239.45.203	A	mail2.soft11.co.kr
203.239.45.203	A	www.soft11.co.kr
203.239.47.100	A	ns.woorihom.com
203.239.47.108	A	smg.woorihom.com
203.239.52.119	A	owa.sarang.or.kr
203.239.57.69	A	virus.koreastock.co.kr
203.239.57.69	A	virus.koreabond.co.kr
203.239.57.69	A	virus.xn--jj0bl19b2har88ar0dstb.com
203.239.57.140	A	ns.hws.co.kr
203.239.57.160	A	mail.koreabond.com
203.239.57.181	A	www.koreastock.co.kr
203.239.57.181	A	koreabond.co.kr
203.239.59.11	A+PTR	mail.seoulcoms.co.kr
203.239.59.11	A	www.seoulcoms.co.kr
203.239.59.11	A	seoulcoms.co.kr
203.239.74.1	A	gowww.co.kr
203.239.86.100	PTR	choltd.com
203.239.86.100	PTR	mail.choltd.com
203.239.91.1	A+PTR	g3server.aidcorp.com
203.239.91.1	A	aidcorp.com
203.239.91.9	A	mail.aidcorp.com
203.239.100.38	A	nappiron.vpay.co.kr
203.239.100.52	A	efds.vpay.co.kr
203.239.100.52	A	vp.co.kr
203.239.100.52	A	vpay.co.kr
203.239.100.195	A	tr.vpay.co.kr
203.239.102.129	A+PTR	www.mariababy.com
203.239.102.129	A	mariababy.com
203.239.102.130	PTR	203.239.102.128-255.mariababy.com
203.239.102.130	A	www.mariababy.co.kr
203.239.102.130	A	mariababy.co.kr
203.239.103.226	A	xn--9kq39iyxikw2cy7g8sp.com
203.239.104.28	A+PTR	inbound2.baekimlee.com
203.239.104.28	PTR	inbound2.beakimlee.com
203.239.104.28	A+PTR	inbound2.bkl.co.kr
203.239.104.50	PTR	inbound.baekimlee.com
203.239.104.50	PTR	inbound.beakimlee.com
203.239.104.50	PTR	inbound.bkl.co.kr
203.239.105.130	A	ipteacher.urinhana.com
203.239.105.130	A	mail.urinhana.com
203.239.105.180	A	smtp.tuv-sud.kr
203.239.108.65	PTR	mail.kjcor.co.kr
203.239.118.1	A	intelpros.com
203.239.118.3	A	mail.intelpros.com
203.239.125.37	A	smtp.yeshin.co.kr