These entries are queried from radb.net using whois, you can try my project getting these.
:AS27254 route: 64.147.32.0/20 descr: ATC origin: AS27254 mnt-by: MAINT-AS13807 changed: jclingan [at] gpcom.com 20181119 #15:56:19Z source: RADB last-modified: 2023-11-13T15:57:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source