Robtex

Up: 203.255.232.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.255.233.0/25
Down right: 203.255.233.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.255.233.1	A+PTR	ns.gyo6.net
203.255.233.2	A	ns2.gyo6.net
203.255.233.21	A+PTR	www.gyo6.net
203.255.233.21	PTR	apk.gyo6.net
203.255.233.21	A	gyo6.net
203.255.233.22	A	webmail.gyo6.net
203.255.233.22	A	edu.gyo6.net
203.255.233.78	PTR	spam.gyo6.net
203.255.233.79	PTR	spam.gyo6.net
203.255.233.80	A+PTR	smail.gyo6.net
203.255.233.80	A	spam.gyo6.net
203.255.233.102	A	webmail.gyo6.net
203.255.233.210	A	jinryang.hs.kr
203.255.233.210	A	nongam.es.kr
203.255.233.210	A	dong-myung.es.kr