Robtex

Up: 221.138.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 221.138.0.0/17
Down right: 221.138.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.138.11.238	A	ansrl90.synology.me
221.138.11.238	A	www.ansrl90.synology.me
221.138.16.146	A	hekefu.com
221.138.17.146	A	ns.0solution.net
221.138.17.146	A	root.0solution.net
221.138.17.146	A	ns.0nara.net
221.138.35.85	A	hpkorea.net
221.138.36.14	A	joonee.com
221.138.51.35	A	cloud.dobob.kr
221.138.51.186	A	www.videostudio.co.kr
221.138.51.186	A	videostudio.co.kr
221.138.97.181	A	www.05668.com
221.138.102.240	A	cult21.com
221.138.106.141	A	mail.nocr.net
221.138.148.87	A	falldown.myqnapcloud.com
221.138.162.248	A	www.kleaguearchive.com
221.138.162.248	A	kleaguearchive.com
221.138.165.53	A	www.carroty.synology.me
221.138.169.141	A	wsp.co.kr
221.138.169.141	A	vivakr.com
221.138.169.141	A	www.wsp.co.kr
221.138.184.193	A	way2java.net
221.138.204.246	A	atkynk.com
221.138.206.137	A	zcube.kr
221.138.206.137	A	*.zcube.kr
221.138.222.216	A	godqhrdnd.com
221.138.227.89	A	elcu.me
221.138.234.222	A	sungho.kim
221.138.236.202	A	mail.tmoncorp.com
221.138.236.203	PTR	mail.tmoncorp.com
221.138.236.204	PTR	mail2.tmoncorp.com
221.138.236.204	A	tmonmail2.tmoncorp.com
221.138.236.247	A	ns2.tmoncorp.com
221.138.240.80	A	exodusflying.com
221.138.242.154	A	ashindev.com
221.138.252.93	PTR	mail.heber.co.kr
221.138.252.93	A	heber.co.kr
221.138.252.104	A	suncar.kr