Robtex

Up: 211.189.164.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 211.189.164.0/25
Down right: 211.189.164.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.189.164.29	A	m-nano.ncsoft.com
211.189.164.96	A+PTR	smtp2.ncsoft.net
211.189.164.96	A	smtp2.ncits.co.kr
211.189.164.100	PTR	smtp1.ncsoft.net
211.189.164.100	A	smtp1.aion.co.kr
211.189.164.100	A	mail.ncfoundation.or.kr