These entries are queried from radb.net using whois, you can try my project getting these.
:AS18027 route: 211.42.48.0/23 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.42.48.0/24 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: modori [at] kt.co.kr 20030904 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: 211.42.49.0/24 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: modori [at] kt.co.kr 20030904 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: 211.42.104.0/24 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.241.24.0/24 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.241.26.0/23 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.241.52.0/22 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.241.52.0/23 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: chss93 [at] soback.kornet.net 20030905 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: 211.241.54.0/23 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: chss93 [at] soback.kornet.net 20030905 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: 211.241.56.0/21 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 211.241.56.0/22 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: chss93 [at] soback.kornet.net 20030905 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: 211.241.60.0/22 descr: NAMSEOUL University origin: AS18027 mnt-by: MAINT-AS4766 changed: chss93 [at] soback.kornet.net 20030905 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: 220.68.176.0/20 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 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: 220.68.192.0/24 descr: contact noc [at] bora.net if necessary origin: AS18027 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030627 source: RADB last-modified: 2023-11-13T16:09:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source