These entries are queried from radb.net using whois, you can try my project getting these.
:AS9646 route: 211.47.160.0/22 descr: contact scyoon [at] egios.com if necessary origin: AS9646 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20011223 source: RADB last-modified: 2023-11-13T16:09:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.47.160.0/24 descr: Sejong Telecom origin: AS9646 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20100722 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: 211.47.161.0/24 descr: Sejong Telecom origin: AS9646 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20100722 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: 211.47.162.0/24 descr: eGIOS origin: AS9646 mnt-by: MAINT-AS4766 changed: choi [at] streamwk.kix.net 20010216 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: 211.47.163.0/24 descr: Sejong Telecom origin: AS9646 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20100722 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source