These entries are queried from radb.net using whois, you can try my project getting these.
:AS24026 route: 203.230.118.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.230.119.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.230.124.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.230.125.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.230.127.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.232.108.0/24 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 source: RADB last-modified: 2023-11-13T16:09:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.107.148.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.107.149.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.107.150.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.107.151.0/24 descr: SejongTelecom.co.ltd origin: AS24026 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210114 source: RADB last-modified: 2023-11-13T16:03:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.211.1.0/24 descr: Ministry of Culture, Sports and Tourism origin: AS24026 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20170215 #17:00:31Z source: RADB last-modified: 2023-11-13T15:50:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.216.41.0/24 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 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: 210.216.42.0/23 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 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: 218.149.15.0/24 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 source: RADB last-modified: 2023-11-13T16:09:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 218.149.16.0/23 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 source: RADB last-modified: 2023-11-13T16:09:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 220.66.6.0/24 descr: contact noc [at] bora.net if necessary origin: AS24026 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040304 source: RADB last-modified: 2023-11-13T16:09:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source