Robtex

Up: 203.255.208.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.255.208.0/23
Down right: 203.255.210.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.255.208.108	A+PTR	bomul.nida.or.kr
203.255.208.215	A	lion.nida.or.kr
203.255.210.37	A	oldwhois.nic.or.kr
203.255.210.69	A	agency.nic.or.kr
203.255.210.85	A	member.nic.or.kr
203.255.210.85	A	ip.nic.or.kr
203.255.210.85	A	ip.kisa.or.kr
203.255.210.108	A	www.rootca.or.kr
203.255.210.108	A	rootca.or.kr
203.255.210.109	A	isms.kisa.or.kr
203.255.210.109	A	www.spamcop.or.kr
203.255.210.115	A	isis.nida.or.kr
203.255.210.120	A	www.whois.kr
203.255.210.120	A	xn--c79as89aj0e29b77z.xn--3e0b707e
203.255.210.120	A	www.xn--c79as89aj0e29b77z.xn--3e0b707e
203.255.210.139	A	www.idrc.or.kr
203.255.210.139	A	idrc.or.kr
203.255.210.164	A	domain.kisa.or.kr
203.255.210.164	A	www.nic.or.kr
203.255.210.164	A	domain.nic.or.kr
203.255.210.183	A	oid.kr
203.255.210.183	A	mcode.kr
203.255.210.244	A	search.kisa.or.kr