These entries are queried from radb.net using whois, you can try my project getting these.
:AS38245 route6: 2406:2240::/48 descr: VIETBRANDS-AS-VN origin: AS38245 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip [at] viettel.com.vn 20200617 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source