These entries are queried from radb.net using whois, you can try my project getting these.
:AS18303 route: 211.192.50.0/24 descr: contact noc [at] bora.net if necessary origin: AS18303 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030806 source: RADB last-modified: 2023-11-13T16:09:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source