Robtex

Up: 203.255.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.255.236.0/23
Down right: 203.255.238.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.255.236.3	A+PTR	kreisun.krei.re.kr
203.255.236.3	A	krei.re.kr
203.255.236.4	PTR	fta.krei.re.kr
203.255.236.4	A	kreifta.krei.re.kr
203.255.236.7	A	xn--289a0mb833bv65apfbl1d47pezs.kr
203.255.236.8	A	xn--289a0mb833bv65apfbl1d47pezs.kr
203.255.236.8	A	mail.krei.re.kr
203.255.236.8	A	www.fanea.org
203.255.236.11	PTR	xn--289a0mb833bv65apfbl1d47pezs.kr
203.255.236.11	PTR	xn--289a0mh6hry0ab6a36c02.kr
203.255.236.11	PTR	xn--289a74gn1v.kr
203.255.236.14	A	spam.krei.re.kr
203.255.236.16	A+PTR	aoc.krei.re.kr
203.255.236.19	PTR	kreiold.krei.re.kr
203.255.236.36	A	meet.krei.re.kr
203.255.236.40	A+PTR	cloud.krei.re.kr
203.255.236.66	A+PTR	kreifw.krei.re.kr
203.255.236.91	A	krei.re.kr
203.255.236.91	A	www.krei.re.kr