These entries are queried from radb.net using whois, you can try my project getting these.
:AS135957 route: 103.126.152.0/22 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.152.0/23 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.152.0/24 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.153.0/24 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.154.0/23 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.154.0/24 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.126.155.0/24 descr: Customer of Viettel EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df7:4700::/48 descr: EDIC-AS-VN origin: AS135957 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20190610 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source