Robtex

Up: 211.173.10.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 211.173.10.0/25
Down right: 211.173.10.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.173.10.7	A+PTR	api.letskorail.com
211.173.10.9	PTR	story.korail.com
211.173.10.9	A	info.korail.com
211.173.10.10	A	ikorail.com
211.173.10.10	A	www.letskorail.com
211.173.10.10	A	ikorail.net
211.173.10.41	PTR	api.letskorail.com
211.173.10.58	PTR	api.letskorail.com
211.173.10.59	PTR	api.letskorail.com
211.173.10.60	PTR	api.letskorail.com
211.173.10.62	PTR	api.letskorail.com
211.173.10.71	A	nf.letskorail.com
211.173.10.117	A	testtrip.korail.com
211.173.10.129	A	mail01.korail.com
211.173.10.129	A	mail.korail.com