These entries are queried from radb.net using whois, you can try my project getting these.
:AS63756 route: 103.199.12.0/22 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:12:08Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.12.0/22 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:44Z source: APNIC rpki-ov-state: valid route: 103.199.12.0/23 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:13:00Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.12.0/23 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:47Z source: APNIC rpki-ov-state: valid route: 103.199.12.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:13:59Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.12.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:50Z source: APNIC rpki-ov-state: valid route: 103.199.13.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:14:23Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.13.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:53Z source: APNIC rpki-ov-state: valid route: 103.199.14.0/23 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:13:30Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.14.0/23 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:56Z source: APNIC rpki-ov-state: valid route: 103.199.14.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:14:59Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.14.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:12:59Z source: APNIC rpki-ov-state: valid route: 103.199.15.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170122 #03:15:35Z source: RADB last-modified: 2023-11-13T15:50:35Z rpki-ov-state: valid route: 103.199.15.0/24 descr: VSTV-VN origin: AS63756 mnt-by: MAINT-VN-VNNIC last-modified: 2022-01-26T12:13:02Z source: APNIC rpki-ov-state: valid