These entries are queried from radb.net using whois, you can try my project getting these.
:AS135921 route: 103.45.232.0/22 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T06:59:23Z source: APNIC rpki-ov-state: valid route: 103.45.232.0/23 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T06:59:38Z source: APNIC rpki-ov-state: valid route: 103.45.232.0/24 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T06:59:58Z source: APNIC rpki-ov-state: valid route: 103.45.233.0/24 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T07:00:18Z source: APNIC rpki-ov-state: valid route: 103.45.234.0/23 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T07:00:33Z source: APNIC rpki-ov-state: valid route: 103.45.234.0/24 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T07:00:49Z source: APNIC rpki-ov-state: valid route: 103.45.235.0/24 origin: AS135921 descr: MAXSERVER-VN mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T07:01:03Z source: APNIC rpki-ov-state: valid route: 103.69.188.0/22 descr: MAXSERVER-VN origin: AS135921 mnt-by: MAINT-VN-VNNIC last-modified: 2022-03-16T07:49:45Z source: APNIC rpki-ov-state: valid route: 103.98.148.0/22 descr: Customer of Viettel MAXSERVER-AS-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20210107 source: NTTCOM rpki-ov-state: valid route: 103.98.148.0/22 descr: MAXSERVER-VN origin: AS135921 mnt-by: MAINT-VN-VNNIC last-modified: 2021-12-13T06:25:44Z source: APNIC rpki-ov-state: valid route: 103.109.148.0/22 descr: Customer of Viettel MAXSERVER-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180704 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.109.148.0/23 descr: Customer of Viettel MAXSERVER-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180704 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.109.149.0/24 descr: Customer of Viettel MAXSERVER-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180704 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.109.150.0/23 descr: Customer of Viettel MAXSERVER-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180704 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.109.150.0/24 descr: Customer of Viettel MAXSERVER-VN origin: AS135921 notify: noc_ip [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: noc_ip@viettel 20180704 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2407:f1c0::/32 descr: MAXSERVER-VN origin: AS135921 mnt-by: MAINT-VN-VNNIC last-modified: 2023-12-13T17:15:19Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source