These entries are queried from radb.net using whois, you can try my project getting these.
:AS17579 route: 134.75.15.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.16.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.103.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.105.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.107.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.108.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.123.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.124.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.125.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.126.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.127.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.128.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.200.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.253.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.75.254.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.230.1.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.119.23.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.119.127.0/24 descr: SejongTelecom.co.ltd origin: AS17579 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20210413 source: RADB last-modified: 2023-11-13T16:05:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source