Robtex

Up: 125.209.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 125.209.236.0/23
Down right: 125.209.238.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
125.209.236.9	A	bigfile07.mail.naver.com
125.209.236.24	A	bigfile02.mail.naver.com
125.209.236.182	A+PTR	cnsmtp01.nm.naver.com
125.209.236.183	A+PTR	cnsmtp02.nm.naver.com
125.209.236.184	A+PTR	cnsmtp03.nm.naver.com
125.209.237.22	A	mail.philstay.net
125.209.237.22	A	mail.infonex.co.kr
125.209.237.155	A	ns2c1.ncloud-dns.com
125.209.237.156	A	ns4c1.ncloud-dns.com
125.209.238.40	A	lggrth-master.linegame.jp
125.209.238.41	A	lggrtw-master.linegame.jp
125.209.238.43	A	mpos.line.me
125.209.238.44	A	vdn-obs-kr.line-scdn.net
125.209.238.46	A	pic.linefriends.com
125.209.238.72	A	lglp2-proxy.linegame.jp
125.209.238.74	A	lgtmtmg.linegame.jp
125.209.238.75	A	chat-pangya.linecorp.com
125.209.238.77	A	lglp2-game.linegame.jp
125.209.238.78	A	child-keygen.line-apps.com
125.209.238.82	A	lgpkpk-game.linegame.jp
125.209.238.83	A	lgpkpk-proxy.linegame.jp
125.209.238.89	A	gws.play.naver.jp
125.209.238.100	A+PTR	mx1.naver.com
125.209.238.100	A	mail.nukiz.com
125.209.238.100	A	mail.uskyair.com
125.209.238.137	A+PTR	mx2.naver.com
125.209.238.137	A	mx4.naver.com
125.209.238.138	PTR	mx2.naver.com
125.209.238.140	A	my.naver.com.nheos.com
125.209.238.140	A	my.naver.com
125.209.238.143	A	cplsmtpcafe.nm.naver.com
125.209.238.144	A+PTR	crcvmail.navercorp.com
125.209.238.144	A	mx1.navercorp.com
125.209.238.144	A	mx2.navercorp.com
125.209.238.147	A	mail.gammaet.com
125.209.238.149	A	m.mail.naver.com
125.209.238.151	A+PTR	crcvmailnw.nm.naver.com
125.209.238.151	A	mail.holyonebook.com
125.209.238.151	A	mail.netpathy.com
125.209.238.152	A	pop.naver.com
125.209.238.153	A	imap.naver.com
125.209.238.154	A	nmail.naver.com
125.209.238.155	A	smtp.naver.com
125.209.238.156	A	bigfile.naver.com
125.209.238.156	A	xbigfile.naver.com
125.209.238.156	A	bigfile.mail.naver.com
125.209.238.167	A	vaccine.line.naver.jp
125.209.238.168	A	lgcookie-game.linegame.jp
125.209.238.171	A	homeapi.line.naver.jp
125.209.238.172	A	myhome.line.naver.jp
125.209.238.178	A	play.line.me
125.209.238.178	A	play.naver.jp
125.209.238.178	A	event.play.naver.jp
125.209.238.179	A	session.play.naver.jp
125.209.238.181	A	obs-kr-addr.line-apps.com
125.209.238.181	A	obs-kr.line-apps.com.akadns.net
125.209.238.181	A	obs-vn.line-apps.com
125.209.238.186	A	xcdn-cn-prf.line-apps.com
125.209.238.186	A	xcdn-cn.line-apps.com
125.209.238.199	A	lgpsh.linegame.jp
125.209.238.203	A	dvsc3.rts.line.naver.jp
125.209.238.205	A	pdvsc1.rts.line.naver.jp
125.209.238.207	A	timeline.line.naver.jp
125.209.238.209	A	obs-kr-addr.line-apps.com
125.209.238.209	A	obs-kr.line-apps.com.akadns.net
125.209.238.209	A	obs-vn.line-apps.com
125.209.238.213	A	obs-rc.line-apps.com
125.209.238.216	A	api-egg.line-apps.com
125.209.239.70	A	bigfile40.mail.naver.com
125.209.239.135	A+PTR	csmtpbounce01.nm.naver.com
125.209.239.136	A+PTR	csmtpbounce01.nm.naver.com
125.209.239.137	A+PTR	csmtpbounce01.nm.naver.com
125.209.239.150	A+PTR	cnsmtp001.nm.naver.com
125.209.239.154	A+PTR	cnsmtp001.nm.naver.com
125.209.239.167	A+PTR	cnsmtp005.nm.naver.com
125.209.239.168	A+PTR	cnsmtp005.nm.naver.com
125.209.239.201	A+PTR	cvsmtppost002.nm.naver.com
125.209.239.202	A	cvsmtppost004.nm.naver.com
125.209.239.203	A+PTR	cvsmtppost006.nm.naver.com
125.209.239.204	A+PTR	cvsmtppost008.nm.naver.com
125.209.239.205	A+PTR	cvsmtppost010.nm.naver.com
125.209.239.206	A+PTR	cvsmtppost012.nm.naver.com
125.209.239.207	A+PTR	cvsmtppost014.nm.naver.com
125.209.239.207	A	cmailsend30.nm.naver.com
125.209.239.208	A+PTR	cvsmtppost016.nm.naver.com
125.209.239.209	A+PTR	cvsmtppost018.nm.naver.com
125.209.239.210	A	cvsmtppost020.nm.naver.com
125.209.239.211	A	cmailsend34.nm.naver.com
125.209.239.212	PTR	cvsmtppost024.nm.naver.com
125.209.239.213	A+PTR	cvsmtppost026.nm.naver.com
125.209.239.213	A	cmailsend36.nm.naver.com
125.209.239.214	PTR	cmailsend37.nm.naver.com
125.209.239.214	A	cvsmtppost028.nm.naver.com
125.209.239.215	A+PTR	cmailsend38.nm.naver.com
125.209.239.215	A	cvsmtppost030.nm.naver.com
125.209.239.216	A+PTR	cvsmtppost032.nm.naver.com
125.209.239.218	A	cvsmtppost036.nm.naver.com
125.209.239.220	PTR	cplsmtp01.nm.naver.com
125.209.239.220	A	cvnsmtp02.wmail.worksmobile.com
125.209.239.227	A+PTR	cvsmtpout01.nm.naver.com
125.209.239.229	A+PTR	cvsmtpout01.nm.naver.com
125.209.239.231	A	cvsmtppost002.nm.naver.com
125.209.239.231	A	csmtp03.nm.naver.com
125.209.239.232	PTR	csmtp04.nm.naver.com
125.209.239.232	A	cvsmtppost004.nm.naver.com
125.209.239.233	A+PTR	cvsmtppost006.nm.naver.com
125.209.239.234	A	cvsmtppost008.nm.naver.com
125.209.239.235	A+PTR	cvsmtppost010.nm.naver.com
125.209.239.236	PTR	cvsmtppost012.nm.naver.com
125.209.239.237	A+PTR	cvsmtppost014.nm.naver.com
125.209.239.238	A+PTR	cvsmtppost016.nm.naver.com
125.209.239.239	A+PTR	cvsmtppost018.nm.naver.com
125.209.239.240	A+PTR	cvsmtppost020.nm.naver.com
125.209.239.243	A+PTR	cvsmtppost026.nm.naver.com
125.209.239.244	A+PTR	cvsmtppost028.nm.naver.com
125.209.239.245	A+PTR	cvsmtppost030.nm.naver.com
125.209.239.246	A+PTR	cvsmtppost032.nm.naver.com
125.209.239.248	A	cvsmtppost036.nm.naver.com