These entries are queried from radb.net using whois, you can try my project getting these.
:AS46264 route: 146.197.250.0/24 descr: Converse origin: AS46264 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20170406 source: RADB last-modified: 2023-11-13T15:50:56Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source