These entries are queried from radb.net using whois, you can try my project getting these.
:AS131351 route: 103.28.136.0/22 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.136.0/22 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:44Z source: APNIC rpki-ov-state: valid route: 103.28.136.0/22 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.136.0/23 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.136.0/23 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.136.0/23 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:46Z source: APNIC rpki-ov-state: valid route: 103.28.136.0/24 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:48Z source: APNIC rpki-ov-state: valid route: 103.28.136.0/24 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.136.0/24 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.137.0/24 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.137.0/24 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.137.0/24 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:50Z source: APNIC rpki-ov-state: valid route: 103.28.138.0/23 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.138.0/23 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.138.0/23 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:52Z source: APNIC rpki-ov-state: valid route: 103.28.138.0/24 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.138.0/24 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid route: 103.28.138.0/24 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:54Z source: APNIC rpki-ov-state: valid route: 103.28.139.0/24 descr: Proxy-registered route object origin: AS131351 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20120611 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: valid route: 103.28.139.0/24 descr: OCB-VN origin: AS131351 mnt-by: MAINT-VN-VNNIC last-modified: 2022-04-07T01:10:56Z source: APNIC rpki-ov-state: valid route: 103.28.139.0/24 descr: OCB-VN origin: AS131351 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20140317 source: NTTCOM rpki-ov-state: valid