These entries are queried from radb.net using whois, you can try my project getting these.
:AS131412 route: 103.237.60.0/22 descr: CUSTOMER OF VIETTEL SAV-AS-VN origin: AS131412 remarks: this is non-portable space, no exceptions notify: minhna4 [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20140809 source: NTTCOM rpki-ov-state: valid route: 103.237.60.0/22 origin: AS131412 descr: VNPT-Customer-ABBANK-AS-VN mnt-by: MAINT-AS45899 changed: radb [at] vnpt.vn 20221128 notify: ktm.ip [at] vnpt.vn source: RADB last-modified: 2023-11-13T16:13:09Z rpki-ov-state: valid route: 103.237.60.0/22 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:11Z source: APNIC rpki-ov-state: valid route: 103.237.60.0/23 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:14Z source: APNIC rpki-ov-state: valid route: 103.237.60.0/24 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:17Z source: APNIC rpki-ov-state: valid route: 103.237.60.0/24 descr: CUSTOMER OF VIETTEL SAV-AS-VN origin: AS131412 remarks: this is non-portable space, no exceptions notify: minhna4 [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20140809 source: NTTCOM rpki-ov-state: valid route: 103.237.60.0/24 descr: State Audit Office of Vietnam origin: AS131412 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20161210 #15:19:53Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: valid route: 103.237.61.0/24 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:20Z source: APNIC rpki-ov-state: valid route: 103.237.61.0/24 descr: State Audit Office of Vietnam origin: AS131412 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20161210 #15:20:49Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: valid route: 103.237.61.0/24 descr: CUSTOMER OF VIETTEL SAV-AS-VN origin: AS131412 remarks: this is non-portable space, no exceptions notify: minhna4 [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20140809 source: NTTCOM rpki-ov-state: valid route: 103.237.62.0/23 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:23Z source: APNIC rpki-ov-state: valid route: 103.237.62.0/24 descr: State Audit Office of Vietnam origin: AS131412 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20161210 #15:21:19Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: valid route: 103.237.62.0/24 descr: CUSTOMER OF VIETTEL SAV-AS-VN origin: AS131412 remarks: this is non-portable space, no exceptions notify: minhna4 [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20140809 source: NTTCOM rpki-ov-state: valid route: 103.237.62.0/24 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:26Z source: APNIC rpki-ov-state: valid route: 103.237.63.0/24 descr: State Audit Office of Vietnam origin: AS131412 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20161210 #15:21:46Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: valid route: 103.237.63.0/24 descr: SAV-VN origin: AS131412 mnt-by: MAINT-VN-VNNIC last-modified: 2021-10-20T04:19:30Z source: APNIC rpki-ov-state: valid route: 103.237.63.0/24 descr: CUSTOMER OF VIETTEL SAV-AS-VN origin: AS131412 remarks: this is non-portable space, no exceptions notify: minhna4 [at] viettel.com.vn mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20140809 source: NTTCOM rpki-ov-state: valid