Robtex

Up: 211.221.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 211.221.244.0/23
Down right: 211.221.246.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.221.245.142	A	duke.sungkyul.edu
211.221.246.2	A	hana.sungkyul.ac.kr
211.221.246.2	A	hana.sungkyul.edu
211.221.246.2	A	sungkyul.edu
211.221.246.7	A+PTR	hana5.sungkyul.edu
211.221.246.7	A	hana5.sungkyul.ac.kr
211.221.246.8	A	hana1.sungkyul.ac.kr
211.221.246.8	A	hana1.sungkyul.edu
211.221.246.28	PTR	hana3.sungkyul.edu
211.221.246.28	A	mail.sungkyul.ac.kr
211.221.246.28	A	mail.sungkyul.edu