These entries are queried from radb.net using whois, you can try my project getting these.
:AS263367 route6: 2804:1504::/32 descr: ITX-MHNET origin: AS263367 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181009 #13:09:04Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source