Robtex

Up: 220.69.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 220.69.192.0/21
Down right: 220.69.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.69.193.4	A	oldmail.sch.ac.kr
220.69.193.4	A	mail.sch.ac.kr
220.69.193.4	A	asan.sch.ac.kr
220.69.193.130	A+PTR	dns0.sch.ac.kr
220.69.193.131	A	dns1.sch.ac.kr
220.69.193.132	A+PTR	ns0.sch.ac.kr
220.69.193.132	A	ns.sch.ac.kr
220.69.193.133	PTR	ns1.sch.ac.kr
220.69.193.158	PTR	appl.sch.ac.kr
220.69.193.158	PTR	as.sch.ac.kr
220.69.193.158	PTR	sg.sch.ac.kr
220.69.193.160	PTR	hompy-db.sch.ac.kr
220.69.197.37	A+PTR	algae.sch.ac.kr
220.69.197.70	A	allz.net
220.69.197.77	A+PTR	bio.sch.ac.kr
220.69.199.201	A+PTR	library.sch.ac.kr
220.69.200.190	A+PTR	dfire.sch.ac.kr
220.69.203.11	A+PTR	dioh1.sch.ac.kr
220.69.203.14	A+PTR	unix.sch.ac.kr
220.69.203.17	A+PTR	os3.sch.ac.kr
220.69.203.21	A+PTR	os2.sch.ac.kr
220.69.203.22	A+PTR	unix2.sch.ac.kr
220.69.203.23	A+PTR	dioh.sch.ac.kr
220.69.203.91	A+PTR	nn-cse.sch.ac.kr
220.69.203.92	A	ailab.sch.ac.kr
220.69.207.6	PTR	sow-old.sch.ac.kr
220.69.207.7	PTR	sowdb.sch.ac.kr
220.69.207.15	A+PTR	bk21.sch.ac.kr
220.69.207.16	A+PTR	bk21-1.sch.ac.kr
220.69.207.36	A+PTR	hands.sch.ac.kr
220.69.207.71	A+PTR	yellow.sch.ac.kr
220.69.207.76	A	it.sch.ac.kr
220.69.207.76	A	m201srv.sch.ac.kr
220.69.207.102	A+PTR	linear.sch.ac.kr
220.69.207.119	A+PTR	issi.sch.ac.kr
220.69.207.153	A+PTR	jlink21-w.sch.ac.kr
220.69.207.154	A+PTR	jlink21-l.sch.ac.kr
220.69.207.178	A+PTR	main-center.sch.ac.kr
220.69.207.225	A+PTR	power.sch.ac.kr