Robtex

Up: 210.221.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 210.221.192.0/21
Down right: 210.221.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.221.196.45	PTR	ipc119.com
210.221.196.45	A+PTR	pc119.com
210.221.196.45	A+PTR	admin.ipc119.com
210.221.196.54	A+PTR	mail.pc119.com
210.221.196.54	A+PTR	mail.hpccc.co.kr
210.221.196.54	A+PTR	mail.wepeed.co.kr
210.221.196.60	A	hpccc.co.kr
210.221.200.105	A	mail3.xce.co.kr