Robtex

Up: 211.63.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 211.63.64.0/20
Down right: 211.63.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.63.64.2	A+PTR	ns.duruan.net
211.63.64.2	A+PTR	ns.haninternet.net
211.63.64.3	A+PTR	ns2.duruan.net
211.63.64.3	A+PTR	ns2.haninternet.net
211.63.64.3	PTR	nfvi.duruan.kr
211.63.64.4	PTR	www.haninternet.co.kr
211.63.64.10	PTR	ns3.haninternet.net
211.63.64.37	A	minwoo.net
211.63.64.37	A	*.minwoo.net
211.63.64.37	A	hostmaster.minwoo.net
211.63.64.79	PTR	www.duruan.co.kr
211.63.64.79	A	mail2.haninternet.net
211.63.64.79	A	drm.co.kr
211.63.64.80	A	drm.co.kr
211.63.64.80	A	www.drm.co.kr
211.63.64.80	A	www.duruan.co.kr
211.63.65.25	A	mail.yeosucity.com
211.63.65.30	A	ns2.entoo.net
211.63.65.34	PTR	mail.whitecode.co.kr
211.63.65.34	A	whitecode.co.kr
211.63.65.34	A	ns.whitecode.co.kr
211.63.65.69	PTR	daechung.com
211.63.65.69	PTR	gaon-int.com
211.63.65.69	PTR	linkusworld.com
211.63.65.79	A	book802.com
211.63.65.79	A	www.autoenglish.co.kr
211.63.65.79	A	autoenglish.co.kr
211.63.65.101	A	bukwang.com
211.63.65.101	A	webincast.com
211.63.65.101	A	sinsung22.com
211.63.68.63	A	mail2.ksky.co.kr
211.63.69.195	A	server02.mypds.com
211.63.71.72	A	info-link.co.kr
211.63.71.72	A	www.info-link.co.kr
211.63.71.72	A	*.info-link.co.kr
211.63.72.195	A	webmail.zzioo.com
211.63.75.65	A	spam.otronix.co.kr
211.63.75.65	A	spam.otronix.com
211.63.75.97	A	otronix.com
211.63.75.97	A	otronix.com.sg
211.63.75.97	A	mail.otronix.co.kr
211.63.78.130	A	gware.airwin.co.kr
211.63.78.130	A	www.airwin.co.kr
211.63.78.226	A	krshinko.co.kr
211.63.84.194	A	mail.jygnt.com
211.63.86.131	A	tkchem.co.kr
211.63.89.19	A	www.sist.co.kr
211.63.89.19	A	sist.co.kr
211.63.89.19	A	mail.sist.co.kr
211.63.90.193	A	spam.popa.or.kr
211.63.90.193	A	mail.pospen.or.kr
211.63.90.197	A	jjanghee.com
211.63.90.199	A	popa.or.kr