These entries are queried from radb.net using whois, you can try my project getting these.
:AS56281 route: 103.29.43.0/24 descr: BT Investment Management origin: AS56281 notify: routemaster [at] uecomm.net.au mnt-by: MAINT-AS10223 changed: bgpadmin [at] uecomm.com.au 20120215 source: RADB last-modified: 2023-11-13T15:42:03Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source