These entries are queried from radb.net using whois, you can try my project getting these.
:AS393691 route: 12.28.104.0/23 origin: AS393691 descr: Forum Communications Company - 12.28.104.0/23 mnt-by: MAINT-AS15267 changed: dpoehls [at] 702communications.com 20200416 #15:21:35Z source: RADB last-modified: 2023-11-13T16:00:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source