These entries are queried from radb.net using whois, you can try my project getting these.
:AS50200 route: 154.6.142.0/24 origin: AS50200 descr: Hosting mnt-by: MAINT-AS64286 changed: chad [at] logicweb.com 20230217 #00:00:32Z source: RADB last-modified: 2023-11-13T16:15:20Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source