KRNIC is not an ISP but a National Internet Registry similar to APNIC.

[ Network Information ]
IPv4 Address       : 203.237.128.0 - 203.237.255.255 (/17)
Organization Name  : Korean Education Network
Service Name       : KREN
Address            : Seoul Gwanak-gu Gwanak-ro
Zip Code           : 08826
Registration Date  : 20040714

Name               : IP Manager
Phone              : +82-2-882-5363
E-Mail             : kindman@kren.kr

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More specific assignment information is as follows.

[ Network Information ]
IPv4 Address       : 203.237.232.0 - 203.237.232.255 (/24)
Organization Name  : BUSAN NATIONAL UNIVERSITY OF EDUCATION
Network Type       : CUSTOMER
Address            : Geoje1-dong  Yeonje-gu  Busan
Zip Code           : 611736
Registration Date  : 20040726

Name               : IP Manager
Phone              : +82-51-500-7172
E-Mail             : btlee@bnue.ac.kr


- KISA/KRNIC WHOIS Service -