These entries are queried from radb.net using whois, you can try my project getting these.
:AS394340 route: 8.12.144.0/21 descr: SPE datacenter origin: AS394340 remarks: for SPE datacenter notify: network [at] yahoo-inc.com mnt-by: MAINT-YAHOO changed: thorve [at] yahoo-inc.com 20150724 source: RADB last-modified: 2023-11-13T15:48:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source