Robtex

Up: 211.232.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 211.232.4.0/23
Down right: 211.232.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.232.4.10	PTR	static.211-232-4-10.nexg.net
211.232.4.10	A	ns.interfaceit.co.kr
211.232.4.10	A	covex.co.kr
211.232.4.16	A	mail.interfaceit.co.kr
211.232.4.21	PTR	static.211-232-4-21.nexg.net
211.232.4.23	A	www.covex.co.kr
211.232.4.203	PTR	static.211-232-4-203.nexg.net
211.232.6.255	PTR	static.211-232-6-255.nexg.net
211.232.7.2	PTR	static.211-232-7-2.nexg.net