Robtex

Up: 1.234.40.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 1.234.42.0/24
Down right: 1.234.43.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
1.234.42.11	A	833018.com
1.234.42.53	A	download.networkexpress.co.kr
1.234.42.136	A	onexpert.co.kr
1.234.42.137	A	hmcrookie.com
1.234.42.137	A	onexc.co.kr
1.234.42.137	A	www.onexc.co.kr
1.234.42.141	A	www.happyholiday.co.kr
1.234.42.141	A	www.excacademy.co.kr
1.234.42.141	A	excacademy.co.kr
1.234.42.144	A	www.peraid.com
1.234.42.144	A	peraid.com
1.234.42.145	A	achievekorea.com
1.234.42.164	PTR	mwhois1.trueweb.co.kr
1.234.42.164	A	mail.cad-i.net
1.234.42.164	A	mail.koreasmt.co.kr
1.234.42.165	PTR	trueweb2.whoismail.net
1.234.42.166	PTR	trueweb3.whoismail.net
1.234.42.166	A	mail.i-gns.co.kr
1.234.42.166	A	mail.hitachikr.com
1.234.42.167	PTR	trueweb4.whoismail.net
1.234.42.195	A	www.itzjow3.com
1.234.42.195	A	bonzou.com
1.234.42.195	A	pygscapp.com
1.234.42.199	A	bjl.pw
1.234.42.221	A	el7elm.com
1.234.42.221	A	musadiq.com
1.234.42.221	A	www.luanart.com