These entries are queried from radb.net using whois, you can try my project getting these.
:AS9273 route: 203.224.0.0/16 descr: SsangYong Computer System's Corporation, 60-1 Choung-Mu-RO Chung-Gu SEOUL KOR origin: AS9273 mnt-by: MAINT-AS4766 changed: choi [at] streamwk.kix.net 20010207 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.244.0.0/19 descr: Ssangyong 60-1,3 ga ChungMuro JoonGu seoul KOREA REPUBLIC OF origin: AS9273 mnt-by: MAINT-AS4766 changed: choi [at] streamwk.kix.net 20010207 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.255.240.0/21 descr: SsangYong Computer System's Corporation, 60-1 Choung-Mu-RO Chung-Gu Seoul 403-040 KOREA REPUBLIC OF origin: AS9273 mnt-by: MAINT-AS4766 changed: choi [at] streamwk.kix.net 20010207 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source