These entries are queried from radb.net using whois, you can try my project getting these.
:AS4660 route: 203.242.63.0/24 descr: contact jhhuh [at] hansol.net if necessary contact jhpark [at] hansol.co.kr if necessary origin: AS4660 mnt-by: MAINT-AS3786 changed: ysjeon7 [at] bora.net 20000410 source: RADB last-modified: 2023-11-13T16:09:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source