These entries are queried from radb.net using whois, you can try my project getting these.
:AS17880 route: 61.104.171.0/24 descr: Sports Seoul21 origin: AS17880 mnt-by: MAINT-AS4766 changed: driftey [at] kornet.net 20070525 source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 61.104.171.0/24 descr: proxy for HANARO TELECOM route origin: AS17880 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20080504 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.91.6.0/24 descr: proxy for HANARO TELECOM route origin: AS17880 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20080504 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.91.6.0/24 descr: SPORTSSEOUL21.CO origin: AS17880 mnt-by: MAINT-AS4766 changed: jacob [at] kornet.net 20030903 source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source