These entries are queried from radb.net using whois, you can try my project getting these.
:AS135982 route: 103.142.22.0/23 descr: Customer of Viettel HASD-AS-VN origin: AS135982 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190919 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.142.22.0/24 descr: Customer of Viettel HASD-AS-VN origin: AS135982 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190919 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.142.23.0/24 descr: Customer of Viettel HASD-AS-VN origin: AS135982 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190919 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source