Robtex

Up: 211.41.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 211.41.0.0/18
Down right: 211.41.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.41.4.34	PTR	ns2.igroupnet.co.kr
211.41.4.41	PTR	roadin.net
211.41.7.10	PTR	smtp.e-travel.co.kr
211.41.32.30	PTR	007job.com
211.41.32.30	PTR	007job.net
211.41.32.30	PTR	www.007job.com
211.41.35.10	PTR	mtmobile.co.kr
211.41.35.10	PTR	www.mtmobile.co.kr
211.41.35.11	PTR	mail.mtmobile.co.kr
211.41.41.250	A	hanjusoft.com
211.41.50.10	PTR	unhp.co.kr
211.41.50.10	A+PTR	mail.unhp.co.kr
211.41.50.10	A	www.unhp.co.kr
211.41.50.40	A	10kg.kr
211.41.55.4	A	virobot.ktengcore.com
211.41.55.10	A	mail.ktengcore.com
211.41.58.194	A	netsan.net
211.41.58.194	A	sh.consumer.or.kr
211.41.60.1	PTR	woowondv.com
211.41.60.1	PTR	www.woowondv.com
211.41.60.3	PTR	dailyit.com
211.41.60.3	PTR	www.dailyit.com
211.41.60.46	A	mail.yesbnb.com
211.41.60.46	A	www.yesbnb.com
211.41.60.46	A	root.yesbnb.com
211.41.63.51	A	bioinformatics.pe.kr
211.41.63.51	A	www.bioinformatics.pe.kr
211.41.63.52	A	bioinfo.co.kr
211.41.63.53	A	bioinformatics.co.kr
211.41.69.11	PTR	nis2.paran.com
211.41.69.46	A+PTR	smartdns7.paran.com
211.41.69.47	A	smartdns8.paran.com
211.41.69.48	PTR	nis1.paran.com
211.41.78.10	A+PTR	smail2.magicn.com
211.41.78.10	A+PTR	smail2.show.co.kr
211.41.78.15	A+PTR	smail1.magicn.com
211.41.78.15	A+PTR	smail1.show.co.kr
211.41.78.20	PTR	rmail1.magicn.com
211.41.78.20	PTR	rmail1.show.co.kr
211.41.78.21	PTR	rmail2.magicn.com
211.41.78.21	PTR	rmail2.show.co.kr
211.41.80.63	A	inditv.hitel.net
211.41.80.74	PTR	sfac.or.kr
211.41.80.152	A	search3.hanmir.com
211.41.81.131	A	japan.hanmir.com
211.41.81.171	A	lottetown.hanmir.com
211.41.82.32	A	home.hanmir.co.kr
211.41.82.35	A	mail.hanmir.com
211.41.82.35	A	mail.hanmir.co.kr
211.41.82.35	A	mail.hanmir.net
211.41.82.62	PTR	mail1.openmail.paran.com
211.41.82.128	A+PTR	smtpmail02.hanmir.com
211.41.82.128	PTR	smtpmail02.kttwon.com
211.41.82.128	A+PTR	smtpmail02.paran.com
211.41.82.129	PTR	mail0.hanmir.com
211.41.82.129	PTR	mail0.kttown.com
211.41.82.129	PTR	mail0.paran.com
211.41.83.136	A	dailynews.hitel.net
211.41.83.228	A	comic.hanmir.com
211.41.84.12	A	cdns2.hitel.net
211.41.84.13	A	cdns3.hitel.net
211.41.84.182	A	rmail7.paran.com
211.41.84.183	A	rmail8.paran.com
211.41.84.184	A	rmail9.paran.com
211.41.85.29	PTR	sni07.paran.com
211.41.85.29	PTR	sni07.hitel.net
211.41.85.197	PTR	smtp.paran.com
211.41.85.197	PTR	smtp.hitel.net
211.41.87.99	A	home.hitel.net
211.41.87.136	A	biz.hitel.net
211.41.87.136	A	alzip.hitel.net
211.41.100.98	PTR	smf.snse.co.kr
211.41.100.98	A+PTR	smf.unipoint.co.kr
211.41.100.100	A	unimail.unipoint.co.kr
211.41.100.101	A+PTR	umail.unipoint.co.kr
211.41.100.105	A	mail.unipointpoc.com
211.41.108.148	A	speakingncall.com
211.41.109.57	A	smatouch.com
211.41.109.67	A	mail.coreplan.com
211.41.109.67	A	mail.scnj.co.kr
211.41.123.2	A+PTR	ns.suheung.com
211.41.123.2	A	ns.suheung.kr
211.41.123.2	A	ns.geltech.co.kr
211.41.123.6	PTR	spamfilter.suheung.co.kr
211.41.123.16	PTR	mail.suheung.com