These entries are queried from radb.net using whois, you can try my project getting these.
:AS22838 route: 204.110.160.0/20 descr: BT Americas origin: AS22838 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20160118 source: RADB last-modified: 2023-11-13T15:48:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source