These entries are queried from radb.net using whois, you can try my project getting these.
:AS393910 route: 192.203.254.0/24 descr: Kaye Scholer LLP origin: AS393910 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20150504 source: RADB last-modified: 2023-11-13T15:47:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source