These entries are queried from radb.net using whois, you can try my project getting these.
:AS3748 route: 129.254.0.0/16 descr: contact unknown [at] unknown.unknown if necessary origin: AS3748 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20011223 source: RADB last-modified: 2023-11-13T16:09:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source