These entries are queried from radb.net using whois, you can try my project getting these.
:AS18298 route: 168.188.0.0/16 descr: proxy for HANARO TELECOM route origin: AS18298 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20100927 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.0.0/16 descr: contact noc [at] bora.net if necessary origin: AS18298 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20021226 source: RADB last-modified: 2023-11-13T16:09:28Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.234.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.235.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.236.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.237.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.238.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.188.239.0/24 descr: SejongTelecom.co.ltd origin: AS18298 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20201223 source: RADB last-modified: 2023-11-13T16:03:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source