% APNIC found the following authoritative answer from: whois.apnic.net

% [whois.apnic.net node-3]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

aut-num:        AS4766
as-name:        KIXS-AS-KR
descr:          Korea Telecom
descr:          206 Jungja-dong, Bundang-gu, Sungnam city, Gyunggi-do
descr:          KYONGGI
descr:          463-711
country:        KR
admin-c:        KB76-AP
tech-c:         KB76-AP
import:         from AS9277
                action pref=100;
                accept ANY
import:         from AS9318
                action pref=10;
                accept ANY
export:         to AS9277
                announce AS4766
export:         to AS9318
                announce AS4766
default:        to AS9277
                action pref=10;
                networks ANY
changed:        hostmast@nic.or.kr 20040603
mnt-by:         MNT-KRNIC-AP
source:         APNIC

aut-num:        AS4766
as-name:        KT-NET
descr:          KORnet Powered BY Korea Telecom
                Seoul,Korea
                Tel: +82-2-7665902
                <noc@kornet.net>
admin-c:        Kwangsuk Cho
tech-c:         Kwangsuk Cho
import:         from AS6461
                action pref=100;
                accept ANY AND NOT {0.0.0.0/0}
import:         from AS7018
                action pref=100;
                accept ANY AND NOT {0.0.0.0/0}
import:         from AS3967
                action pref=100;
                accept ANY AND NOT {0.0.0.0/0}
import:         from AS2516
                action pref=100;
                accept AS-KDDTRANSIT AS-SEABONE
import:         from AS3758
                action pref=100;
                accept AS3758
import:         from AS3462
                action pref=100;
                accept AS3462
import:         from AS4134
                action pref=100;
                accept AS4134 AND AS4808
import:         from AS4694
                action pref=100;
                accept AS-IDC-JP
import:         from AS4651
                action pref=100;
                accept AS4651
import:         from AS10368
                action pref=100;
                accept AS-DNAI AND NOT {0.0.0.0/0}
import:         from AS4058
                action pref=100;
                accept AS-LINKAGE AND NOT {0.0.0.0/0}
import:         from AS10993
                action pref=100;
                accept AS-IDIOM AND NOT {0.0.0.0/0}
import:         from AS3559
                action pref=200;
                accept AS-KORNETSO AND AS-KORNETTJ AND AS-KORNETTG
import:         from AS4660
                action pref=200;
                accept AS4660
import:         from AS4663
                action pref=200;
                accept AS4663
import:         from AS5051
                action pref=200;
                accept AS5051 AND AS9276
import:         from AS7620
                action pref=200;
                accept AS7620
import:         from AS7561
                action pref=200;
                accept AS7561 AND AS4668
import:         from AS9320
                action pref=200;
                accept AS9320
import:         from AS3608
                action pref=200;
                accept AS3608
export:         to AS6461
                announce AS-KORNET
export:         to AS7018
                announce AS-KORNET
export:         to AS6453
                announce AS-KORNET
export:         to AS3967
                announce AS-KORNET
export:         to AS2516
                announce AS-KORNET
export:         to AS4694
                announce AS-KORNET
export:         to AS3758
                announce AS-KORNET
export:         to AS3462
                announce AS-KORNET
export:         to AS4134
                announce AS-KORNET
export:         to AS4651
                announce AS-KORNET
export:         to AS10368
                announce AS-KORNET
export:         to AS4058
                announce AS-KORNET
export:         to AS10993
                announce AS-KORNET
export:         to AS3559
                announce ANY
export:         to AS4660
                announce ANY
export:         to AS4663
                announce ANY
export:         to AS5051
                announce ANY
export:         to AS7561
                announce ANY
export:         to AS7620
                announce ANY
export:         to AS9320
                announce ANY
export:         to AS3608
                announce ANY
default:        to AS7018
                action pref=1;
                networks ANY
default:        to AS6461
                action pref=10;
                networks ANY
remarks:        noc@kornet.net
mnt-by:         MAINT-AS4766
changed:        kscho@streamwk.kix.net 20000203
source:         RADB

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-d	Associated reverse domain