These entries are queried from radb.net using whois, you can try my project getting these.
:AS990 route: 216.38.131.0/24 origin: AS990 descr: Index Ventures mnt-by: MAINT-AS6994 changed: support [at] fastmetrics.com 20220801 #21:19:17Z source: RADB last-modified: 2023-11-13T16:11:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source