Robtex

Up: 211.47.72.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 211.47.72.128/26
Down right: 211.47.72.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.47.72.139	PTR	ne09.tt.co.kr
211.47.72.139	A	ohna.or.kr
211.47.72.139	A	mdwoori.co.kr
211.47.72.161	A	www.linuxman.co.kr
211.47.72.168	A	stack-wire.net
211.47.72.168	A	smtphub.tt.co.kr
211.47.72.223	A+PTR	mailhub2-23.tt.co.kr
211.47.72.227	A+PTR	mailhub2-27.tt.co.kr
211.47.72.233	PTR	mail-3.tt.co.kr
211.47.72.235	PTR	mail-5.tt.co.kr.72.47.211.in-addr.arpa
211.47.72.239	PTR	mail-9.tt.co.kr
211.47.72.240	PTR	mail-10.tt.co.kr
211.47.72.247	PTR	mail-17.tt.co.kr