Robtex

Up: 211.52.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 211.52.128.0/18
Down right: 211.52.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.52.144.132	PTR	mail.futurenuri.com
211.52.144.132	A	futurenuri.co.kr
211.52.144.132	A	www.futurenuri.co.kr
211.52.148.0	PTR	noneptr.skline.co.kr
211.52.153.132	A	enovationit.com
211.52.173.188	A	londonboy.net
211.52.173.188	A	mail.londonboy.net
211.52.209.148	A	kr.pool.ntp.org
211.52.227.75	A	ocnas.synology.me
211.52.227.75	A	www.ocnas.synology.me
211.52.227.90	A	skncs.com
211.52.227.90	A	popdid.com
211.52.227.91	PTR	mail.skncs.com
211.52.228.144	A	promiseme.net