These entries are queried from radb.net using whois, you can try my project getting these.
:AS45377 route: 203.230.160.0/19 descr: Jeju Edu origin: AS45377 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20090202 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: 211.184.192.0/23 descr: Jeju Edu origin: AS45377 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20090202 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: 211.184.200.0/21 descr: Jeju Edu origin: AS45377 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20090202 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: 211.248.116.0/22 descr: Jeju Edu origin: AS45377 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20090202 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source