Robtex

Up: 202.30.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 202.30.52.0/23
Down right: 202.30.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
202.30.54.33	A	book.hannam.ac.kr
202.30.54.66	A+PTR	www3.hannam.ac.kr
202.30.54.66	A+PTR	home.hnu.ac.kr
202.30.54.67	PTR	usk.kr
202.30.54.67	PTR	usk.ac.kr
202.30.54.67	PTR	hintswww.hnu.kr
202.30.54.68	PTR	eve.hannam.ac.kr
202.30.54.68	PTR	mail.hannam.ac.kr
202.30.54.68	PTR	webmail.hannam.ac.kr
202.30.54.70	PTR	newspam.hannam.ac.kr
202.30.54.70	PTR	spam.hannam.ac.kr
202.30.54.193	A	book-linton.hannam.ac.kr
202.30.54.200	A	annex.hannam.ac.kr
202.30.54.222	A	linton.hannam.ac.kr
202.30.55.9	A	asp2.kunsan.ac.kr
202.30.55.10	A+PTR	asp.kunsan.ac.kr
202.30.55.11	A+PTR	dns.kunsan.ac.kr
202.30.55.11	A	dns.gunsan.ac.kr
202.30.55.13	A	nts.kunsan.ac.kr
202.30.55.19	A+PTR	click.kunsan.ac.kr
202.30.55.19	PTR	san.kunsan.ac.kr
202.30.55.19	A+PTR	w3.kunsan.ac.kr
202.30.55.22	PTR	vod.kunsan.ac.kr
202.30.55.22	PTR	wmt.kunsan.ac.kr
202.30.55.32	A	apc.kunsan.ac.kr
202.30.55.36	PTR	umul.kunsan.ac.kr
202.30.55.39	PTR	mkis.kunsan.ac.kr
202.30.55.40	A+PTR	www.kunsan.ac.kr
202.30.55.40	A	en.kunsan.ac.kr
202.30.55.40	A	ch.kunsan.ac.kr
202.30.55.44	A	bi.kunsan.ac.kr
202.30.55.49	PTR	ch.kunsan.ac.kr
202.30.55.49	PTR	en.kunsan.ac.kr
202.30.55.49	A+PTR	gitcms.kunsan.ac.kr
202.30.55.50	PTR	imap.kunsan.ac.kr
202.30.55.50	PTR	mail.kunsan.ac.kr
202.30.55.50	PTR	smtp.kunsan.ac.kr
202.30.55.51	PTR	spam.kunsan.ac.kr
202.30.55.52	A	idc.kunsan.ac.kr
202.30.55.53	A+PTR	photo.kunsan.ac.kr
202.30.55.54	A	mmail.kunsan.ac.kr
202.30.55.55	A+PTR	ns2.kunsan.ac.kr
202.30.55.56	A	org.kunsan.ac.kr
202.30.55.58	A	oldmail.kunsan.ac.kr
202.30.55.65	A	cms.kunsan.ac.kr
202.30.55.70	A	pc.kunsan.ac.kr
202.30.55.71	A	nuri.kunsan.ac.kr
202.30.55.76	A+PTR	sims.kunsan.ac.kr
202.30.55.80	A	mkis.kunsan.ac.kr
202.30.55.81	A+PTR	baroon.kunsan.ac.kr
202.30.55.96	A	kihong.kunsan.ac.kr
202.30.55.101	A	edc.kunsan.ac.kr
202.30.55.102	A+PTR	ed.kunsan.ac.kr
202.30.55.103	A+PTR	eds.kunsan.ac.kr
202.30.55.137	A+PTR	mrtg.kunsan.ac.kr
202.30.55.150	A	pms.kunsan.ac.kr
202.30.55.200	A+PTR	gomju.kunsan.ac.kr