Robtex

Up: 203.232.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.232.172.0/23
Down right: 203.232.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.232.172.70	A+PTR	www.knou.ac.kr
203.232.172.70	A	dmc.knou.ac.kr
203.232.172.70	A	jpn.knou.ac.kr
203.232.172.77	A	ns1.knou.ac.kr
203.232.172.78	PTR	spam1.knou.ac.kr
203.232.172.78	A	spam.knou.ac.kr
203.232.172.79	PTR	spam.knou.ac.kr
203.232.172.80	A+PTR	mail.knou.ac.kr
203.232.172.83	A+PTR	faculty.knou.ac.kr
203.232.174.1	PTR	ns1.knou.ac.kr
203.232.175.31	PTR	kcup.knou.ac.kr
203.232.175.78	A	mx.tompiscina.com