Robtex

Up: 210.104.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.104.21.0/25
Down right: 210.104.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.104.21.1	A	ns.sisul.or.kr
210.104.21.2	A	ns1.sisul.or.kr
210.104.21.8	A	sisul.or.kr
210.104.21.8	A	cheonggyecheon.or.kr
210.104.21.8	A	www.sisul.or.kr
210.104.21.29	A	webmail.sisul.or.kr
210.104.21.29	A	office.sisul.or.kr
210.104.21.30	A	memorial-park.or.kr
210.104.21.88	A	mail2.sisul.or.kr