These entries are queried from radb.net using whois, you can try my project getting these.
:AS18320 route: 202.31.152.0/24 descr: proxy for HANARO TELECOM route origin: AS18320 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20101026 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.31.152.0/24 descr: contact noc [at] bora.net if necessary origin: AS18320 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20021230 source: RADB last-modified: 2023-11-13T16:09:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.110.56.0/21 descr: proxy for HANARO TELECOM route origin: AS18320 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20101026 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.110.56.0/21 descr: contact noc [at] bora.net if necessary origin: AS18320 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20021230 source: RADB last-modified: 2023-11-13T16:09:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source