These entries are queried from radb.net using whois, you can try my project getting these.
:AS31819 route: 208.42.199.0/24 descr: Originate from AS31819 origin: AS31819 mnt-by: MAINT-AS13760 changed: graham.wooden [at] uniti.com 20180425 #19:17:31Z source: RADB last-modified: 2023-11-13T15:53:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source