Robtex

Up: 211.47.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 211.47.72.0/25
Down right: 211.47.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.47.72.1	A	0-0-mydomain.com
211.47.72.1	A	intdomain.com
211.47.72.1	A	selfnic.com
211.47.72.10	PTR	mail-10.tt.co.kr
211.47.72.56	PTR	queue1.tt.co.kr
211.47.72.56	A	mail2.indeogwon.net
211.47.72.56	A	mail2.ailintl.com
211.47.72.61	A	ns1.ttinfo.net
211.47.72.69	A	linuxman.co.kr
211.47.72.77	A	r08.tt.co.kr
211.47.72.78	A	r10.tt.co.kr
211.47.72.87	A+PTR	mailhub1-87.tt.co.kr
211.47.72.99	A	www.shingifishing.com
211.47.72.99	A	www.syscome.com
211.47.72.99	A	www.concm.net
211.47.72.107	A	neo.co.kr
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