Direct Phone Number which is regarding for AS297

Hi!
This is KORnet NOC from Korea Telecom in seoul , KOREA.
We'd like to know who is in charge of operation for AS297.
AS297 have advertized our customer i.p block and it's owned by
my customer as follow.
route: 203.252.128.0/18
descr: Konkuk University.
descr: Mojin-dong 93-1
descr: seongdong-gu
descr: Seoul
descr: 133-701
descr: KOREA
descr: REPUBLIC OF
origin: AS2563
comm-list: COMM_NSFNET
advisory: AS690 1:297(144) 3:297(147)
mnt-by: MAINT-AS2563
changed: shlee@iserver.kren.nm.kr 980416
source: RADB

I'd like to know direct phone number and name who is in charge of
as297 operation ?

Best Regards,