Robtex

Up: 211.41.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 211.41.112.0/21
Down right: 211.41.120.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.41.123.2	A+PTR	ns.suheung.com
211.41.123.2	A	ns.suheung.kr
211.41.123.2	A	ns.geltech.co.kr
211.41.123.6	PTR	spamfilter.suheung.co.kr
211.41.123.16	A+PTR	mail.suheung.com
211.41.123.16	A	sh016.suheung.com
211.41.123.18	PTR	mail.suheung.com