Robtex

Up: 61.110.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 61.110.0.0/19
Down right: 61.110.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
61.110.2.56	PTR	mail.halla.com
61.110.2.56	PTR	mail.icols.com
61.110.2.56	PTR	mail.mandoplaza.com
61.110.2.92	PTR	mta05.icols.com
61.110.4.11	A	ns1.zcdn.co.kr
61.110.4.12	A	ns2.zcdn.co.kr
61.110.4.83	A	emcache01.zcdn.co.kr
61.110.4.93	A	emcache01.zcdn.co.kr
61.110.4.101	A	emcache01.zcdn.co.kr
61.110.4.102	A	emcache01.zcdn.co.kr
61.110.4.103	A	emcache01.zcdn.co.kr
61.110.4.111	A	emcache01.zcdn.co.kr
61.110.4.112	A	emcache01.zcdn.co.kr
61.110.4.113	A	emcache01.zcdn.co.kr
61.110.4.227	A	kcsagentnxr.kamuse.zcdn.co.kr
61.110.4.233	A	kcsagentnxr.kamuse.zcdn.co.kr
61.110.7.23	A	crsmedia.co.kr
61.110.17.112	A	www.down2.co.kr
61.110.18.130	A	dittabook.co.kr
61.110.18.130	A	dittabook.com
61.110.20.156	PTR	halla.co.kr
61.110.20.161	PTR	halla.co.kr
61.110.20.161	A	xn--z69a52s6whq5u.net
61.110.20.161	A	xn--oi2bn08c.net
61.110.20.162	PTR	spam.halla.com
61.110.20.163	PTR	mail.halla.com
61.110.24.42	A	mail.ehrdi-kut.ac.kr
61.110.24.42	A	ehrdi-kut.ac.kr
61.110.24.46	A	mail.ekoreatech.ac.kr
61.110.24.46	A	mail.ekut.ac.kr
61.110.25.10	PTR	samwhapaper.com
61.110.25.31	PTR	anyline.co.kr
61.110.49.13	A	ns2.buzzms.co.kr
61.110.49.13	A	ns2.realsn.co.kr
61.110.49.18	A	ns5.realsn.co.kr
61.110.49.18	A	ns5.buzzms.co.kr
61.110.49.23	PTR	mail.realsn.com
61.110.53.2	PTR	mail.eye-sky.com
61.110.53.2	A	ns1.eye-sky.com
61.110.53.4	A+PTR	mail1.eye-sky.com
61.110.53.5	A	jejuforum.or.kr
61.110.53.5	A	jeju.nodong.org