Robtex

Up: 221.161.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 221.161.97.0/25
Down right: 221.161.97.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.161.97.1	A	mail.bcr.or.kr
221.161.97.33	A	webmail.spo1.org
221.161.97.33	A	webmail.spo1.co.kr
221.161.97.33	A	mail.spo1.co.kr
221.161.97.35	A	spo1.org
221.161.97.35	A	spo1.or.kr
221.161.97.35	A	www.bcr.or.kr