Robtex

Up: 103.12.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.12.248.0/23
Down right: 103.12.250.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.12.248.2	PTR	krweb.krs.co.kr
103.12.248.3	A+PTR	apollon.krs.co.kr
103.12.248.4	A	ns2.krs.co.kr
103.12.248.6	A+PTR	krhellas.com
103.12.248.6	A+PTR	tscforum.org
103.12.248.6	PTR	www.koreanregister.com
103.12.248.8	A+PTR	checklist.krs.co.kr
103.12.248.8	A+PTR	checktest.krs.co.kr
103.12.248.8	A	krimo.krs.co.kr
103.12.248.9	A	krcon.krs.co.kr
103.12.248.10	PTR	e-fleet.krs.co.kr
103.12.248.10	A+PTR	krcon.krs.co.kr
103.12.248.23	A	crm.krs.co.kr
103.12.248.40	A	tscforum.org
103.12.248.47	A	remote.krs.co.kr
103.12.248.49	A	krhellas.com
103.12.248.132	A	krweb.krs.co.kr
103.12.248.133	PTR	mail.krs.kr
103.12.248.133	PTR	krmailnew.forever.local
103.12.248.133	A+PTR	mailhdo.krs.co.kr
103.12.248.146	A+PTR	block.krs.co.kr
103.12.248.175	A+PTR	autodiscover.krs.co.kr
103.12.248.175	A+PTR	mail.krs.co.kr
103.12.248.254	A+PTR	local.krs.co.kr