These entries are queried from radb.net using whois, you can try my project getting these.
:AS21997 route: 192.74.136.0/24 descr: Apex CoVantage origin: AS21997 mnt-by: MAINT-AS29863 changed: ip-addr [at] data393.net 20150617 #18:55:07Z source: RADB last-modified: 2023-11-13T15:47:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source