Robtex

Up: 203.255.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 203.255.0.0/19
Down right: 203.255.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.255.1.16	A+PTR	mail.gnu.ac.kr
203.255.1.16	A	webmail.gnu.kr
203.255.1.16	A	webmail.gnu.ac.kr
203.255.1.21	PTR	nongae.gsnu.ac.kr
203.255.1.22	PTR	nongae1.gnu.ac.kr
203.255.1.25	A	history.gsnu.ac.kr
203.255.1.25	A	marine.gnu.ac.kr
203.255.1.85	A	gelc.co.kr
203.255.1.138	A	www.gelc.or.kr
203.255.1.138	A	e4edu.com
203.255.1.138	A	me4edu.com
203.255.2.50	A	gsars.gsnu.ac.kr
203.255.2.51	A	gsars.gsnu.ac.kr
203.255.2.61	A	sic1600a.gsnu.ac.kr
203.255.2.71	A	disk.gsnu.ac.kr
203.255.2.72	PTR	editor.gnu.ac.kr
203.255.2.72	A	editor.gsnu.ac.kr
203.255.2.80	A	media.gsnu.ac.kr
203.255.3.47	A+PTR	ccd.gsnu.ac.kr
203.255.3.48	A	ns1.jehos.net
203.255.3.69	PTR	youlee.gsnu.ac.kr
203.255.3.87	A	jun.gsnu.ac.kr
203.255.3.100	A	ailab.gsnu.ac.kr
203.255.3.155	A	agribio.gsnu.ac.kr
203.255.3.157	A	max.gsnu.ac.kr
203.255.8.221	A	eclab.gsnu.ac.kr
203.255.9.88	A+PTR	ile.gsnu.ac.kr
203.255.10.17	A	dna.gsnu.ac.kr
203.255.10.130	A	mech.gsnu.ac.kr
203.255.11.24	A	hep1.gsnu.ac.kr
203.255.11.25	A	cnbe.gsnu.ac.kr
203.255.11.71	A+PTR	hep.gsnu.ac.kr
203.255.11.176	A	hepb.gsnu.ac.kr
203.255.11.225	A	jasin.gsnu.ac.kr
203.255.12.80	A	cecc-1.gsnu.ac.kr
203.255.13.33	A	cvlab.gsnu.ac.kr
203.255.13.60	A	fem.gsnu.ac.kr
203.255.13.111	A	itd.gsnu.ac.kr
203.255.13.113	A	cnspl.gsnu.ac.kr
203.255.13.136	A	gonapus.net
203.255.13.150	A+PTR	eme.gsnu.ac.kr
203.255.13.175	A	comon.gsnu.ac.kr
203.255.14.19	PTR	acml.gnu.ac.kr
203.255.14.45	A+PTR	mech2.gsnu.ac.kr
203.255.14.70	A	mech1.gsnu.ac.kr
203.255.14.82	A	fluid.gsnu.ac.kr
203.255.14.119	A	me.gsnu.ac.kr
203.255.14.186	A	green.gsnu.ac.kr
203.255.14.210	A+PTR	md.gsnu.ac.kr
203.255.14.253	A	vib.gsnu.ac.kr
203.255.15.146	PTR	abeek.gnu.ac.kr
203.255.16.17	A	ade.gsnu.ac.kr
203.255.16.58	A	ns1.gsnu.ac.kr
203.255.16.61	A	gaza.gsnu.ac.kr
203.255.16.104	A	gsce.gsnu.ac.kr
203.255.16.166	A	beo2.gsnu.ac.kr
203.255.16.227	A	em3d.gsnu.ac.kr
203.255.17.64	A	maed.gsnu.ac.kr
203.255.18.77	A	haso.gsnu.ac.kr
203.255.18.78	A	blue.gsnu.ac.kr
203.255.19.39	A	irs.gsnu.ac.kr
203.255.19.80	PTR	nebula.gsnu.ac.kr
203.255.19.80	A	speech.gnu.ac.kr
203.255.19.80	A	nebula.gnu.ac.kr
203.255.19.147	PTR	ruby.gnu.ac.kr
203.255.21.133	A+PTR	ilo.gsnu.ac.kr
203.255.22.54	A	ame.gsnu.ac.kr
203.255.22.149	A	gsae.gsnu.ac.kr
203.255.23.18	PTR	gcbrt.gsnu.ac.kr.23.255.203.in-addr.arpa
203.255.23.29	A	library.gsnu.ac.kr
203.255.24.92	A	lee.gsnu.ac.kr
203.255.24.154	A+PTR	biogreen.gsnu.ac.kr
203.255.25.108	A	fp.gsnu.ac.kr
203.255.28.151	A+PTR	giit.gsnu.ac.kr
203.255.30.220	A	kid.gsnu.ac.kr
203.255.31.43	A+PTR	dop.gsnu.ac.kr
203.255.31.120	PTR	bioinfo.gsnu.ac.kr
203.255.31.120	A	bioinfo.gnu.ac.kr
203.255.32.57	A	keto.gsnu.ac.kr
203.255.33.87	A	jwk.gsnu.ac.kr
203.255.33.156	A	mouse.gsnu.ac.kr
203.255.33.224	PTR	cpu.gnu.ac.kr
203.255.33.224	A	cpu.gsnu.ac.kr
203.255.35.40	A+PTR	physica.gsnu.ac.kr
203.255.36.77	A	ae.gsnu.ac.kr
203.255.37.130	PTR	bk21.gnu.ac.kr
203.255.37.130	A	bk21.gsnu.ac.kr
203.255.38.148	A+PTR	iss1.gnu.ac.kr
203.255.38.148	A	iss1.gsnu.ac.kr
203.255.39.145	PTR	itrc.gnu.ac.kr
203.255.39.145	A	itrc.gsnu.ac.kr
203.255.39.147	A	nvision.gnu.ac.kr
203.255.39.247	PTR	earth.gsnu.ac.kr
203.255.40.30	A	gis.gsnu.ac.kr
203.255.40.152	A	cem.gsnu.ac.kr
203.255.41.39	A	cif.gsnu.ac.kr
203.255.41.134	A+PTR	kimjy.gsnu.ac.kr
203.255.44.135	A+PTR	bio.gsnu.ac.kr
203.255.44.185	A	gua.gsnu.ac.kr
203.255.45.161	A+PTR	history.gsnu.ac.kr
203.255.45.200	A	hy.gsnu.ac.kr
203.255.48.91	A+PTR	msjoun.gnu.ac.kr
203.255.48.97	A	ma.gsnu.ac.kr
203.255.48.231	A	acml.gsnu.ac.kr
203.255.51.239	A	marine.gnu.ac.kr
203.255.53.52	A+PTR	syscon.gsnu.ac.kr
203.255.53.52	A	syscon.gnu.ac.kr
203.255.53.177	A	cae.gsnu.ac.kr
203.255.56.53	A	yonwi.com
203.255.56.53	A	makhtar.ddns.net
203.255.56.53	A	softensys.com
203.255.57.135	A	dslab.gsnu.ac.kr
203.255.62.128	A	bsj.gsnu.ac.kr
203.255.62.253	A	busokgo.gsnu.ac.kr
203.255.63.135	PTR	ehs2.gnu.kr
203.255.63.135	PTR	ehs2.gsnu.kr
203.255.63.135	PTR	ehs2.gnu.ac.kr