These entries are queried from radb.net using whois, you can try my project getting these.
:AS135912 route: 103.90.220.0/22 descr: Customer of Viettel VNETWORK-VN origin: AS135912 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180919 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.90.221.0/24 descr: Customer of Viettel VNETWORK-VN origin: AS135912 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20221205 source: NTTCOM last-modified: 2022-12-05T06:49:12Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.90.222.0/24 descr: Customer of Viettel VNETWORK-VN origin: AS135912 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180919 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.90.223.0/24 descr: VNETWORK-VN origin: AS135912 mnt-by: MAINT-VN-VNNIC last-modified: 2022-09-09T15:36:42Z source: APNIC rpki-ov-state: valid route: 103.90.223.0/24 descr: Customer of Viettel VNETWORK-VN origin: AS135912 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180919 source: NTTCOM rpki-ov-state: valid route: 103.90.223.0/24 descr: VNETWORK-VN origin: AS135912 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20180815 #09:05:25Z source: RADB last-modified: 2023-11-13T15:54:26Z rpki-ov-state: valid route: 103.183.109.0/24 descr: VNETKIWON-VN origin: AS135912 mnt-by: MAINT-VN-VNNIC last-modified: 2024-03-07T08:17:08Z source: APNIC rpki-ov-state: valid route: 103.183.109.0/24 origin: AS135912 descr: VNetwork customer of VNPT-IT mnt-by: MAINT-AS45899 changed: radb [at] vnpt.vn 20240304 # 0643Z source: RADB last-modified: 2024-03-04T06:43:01Z rpki-ov-state: valid route6: 2405:f540:1::/48 descr: Customer of Viettel VNETWORK-VN origin: AS135912 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20221206 source: NTTCOM last-modified: 2022-12-06T07:40:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source