Robtex

Up: 203.226.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 203.226.128.0/18
Down right: 203.226.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.226.128.1	A+PTR	spam1.doosan.com
203.226.128.1	A	jaewonpark.com
203.226.128.1	A	familypark.net
203.226.128.5	PTR	ns.doosan.com
203.226.128.201	A	doosan-timetraveler.org
203.226.128.201	A	doosan-timetraveler.com
203.226.128.201	A	timetraveler.co.kr
203.226.128.231	PTR	m.doosan.com
203.226.128.232	PTR	ftpsvc.doosan.com
203.226.133.77	PTR	info.doosan.co.kr
203.226.135.72	A	fashionapt.com
203.226.135.79	A	pakalife.com
203.226.135.87	A	dselab.com
203.226.135.87	A	dse.kr
203.226.135.132	A	doosan.ie
203.226.135.172	A	zenithilsan.com
203.226.135.172	A	weveapt.com
203.226.135.172	A	www.weveapt.com
203.226.136.31	A	www.daewooexca.co.kr
203.226.137.151	A	dw1.doosaninfracore.com
203.226.137.152	A	dw2.doosaninfracore.com
203.226.137.202	A	doosanindustrialvehicle.com
203.226.137.202	A	mecatec.co.kr
203.226.138.11	A+PTR	ns001.doosan.com
203.226.138.12	A+PTR	ns002.doosan.com
203.226.138.63	A+PTR	msp.doosan-iv.com
203.226.138.63	A+PTR	service.doosan-iv.co.kr
203.226.138.63	PTR	service.doosan-iv.com
203.226.138.166	A	www.doosanclub.com
203.226.138.166	A	email.doosanclub.com
203.226.138.166	A	doosanclub.co.kr
203.226.139.16	A+PTR	ems.style.co.kr
203.226.139.92	A	dcumall.com
203.226.144.10	PTR	noolza.doosan.com
203.226.167.9	A+PTR	cp.doosan.com
203.226.173.45	A	mail.dsland.co.kr
203.226.173.45	A	dsland.co.kr
203.226.174.120	PTR	dsland.co.kr
203.226.174.120	PTR	mail.dsland.co.kr
203.226.177.27	A	eipex.doosan.com
203.226.191.10	A	cubic.doosan.com
203.226.241.173	A	lwedady-eager-ocelot.xyz
203.226.253.11	A	pop.lycos.co.kr
203.226.253.16	A	emsopen.nate.com
203.226.253.27	A	netplex.nate.com
203.226.253.35	A	gslb1.nate.com
203.226.254.20	A	xso.nate.com
203.226.254.20	A	xo.nate.com
203.226.254.21	A	member.nate.com
203.226.254.29	A	m.dotori.nate.com
203.226.254.137	A	oditto.com
203.226.254.137	A	www.oditto.com
203.226.254.232	PTR	ns1.natecorp.com
203.226.254.233	PTR	ns2.natecorp.com
203.226.255.7	A	adimg.nate.com
203.226.255.8	A	adimg.nateimg.co.kr
203.226.255.9	A	cyad.nate.com
203.226.255.11	A	cyad1.nate.com
203.226.255.131	A	club.nate.com