These entries are queried from radb.net using whois, you can try my project getting these.
:AS131795 route: 203.241.220.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.241.221.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.241.222.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.241.223.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.0.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.1.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.2.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.3.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.4.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.13.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.45.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.57.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.98.58.0/24 descr: SejongTelecom.co.ltd origin: AS131795 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net20210427 20210426 source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source