These entries are queried from radb.net using whois, you can try my project getting these.
:AS23587 route: 59.5.41.0/24 descr: Korea Credit Bureau origin: AS23587 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20051209 source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 59.5.41.0/24 descr: proxy for HANARO TELECOM route origin: AS23587 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20080504 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.255.136.0/23 descr: proxy for HANARO TELECOM route origin: AS23587 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20080504 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.255.136.0/23 descr: Korea Credit Bureau origin: AS23587 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20051209 source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.255.136.0/24 descr: KCB-AS-KR origin: AS23587 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20201018 #12:43:18Z source: RADB last-modified: 2023-11-13T16:02:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.255.137.0/24 descr: KCB-AS-KR origin: AS23587 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20201018 #12:43:18Z source: RADB last-modified: 2023-11-13T16:02:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source