These entries are queried from radb.net using whois, you can try my project getting these.
:AS131438 route: 103.196.16.0/22 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:39Z source: APNIC rpki-ov-state: valid route: 103.196.16.0/22 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.16.0/22 descr: Proxy-registered route object origin: AS131438 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20180423 source: RADB last-modified: 2023-11-13T15:53:26Z rpki-ov-state: valid route: 103.196.16.0/23 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.16.0/23 descr: Proxy-registered route object origin: AS131438 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20180423 source: RADB last-modified: 2023-11-13T15:53:26Z rpki-ov-state: valid route: 103.196.16.0/23 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:41Z source: APNIC rpki-ov-state: valid route: 103.196.16.0/24 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:43Z source: APNIC rpki-ov-state: valid route: 103.196.16.0/24 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.16.0/24 descr: VNPOST origin: AS131438 mnt-by: MAINT-AS45903 changed: chuyen.lv [at] cmctelecom.vn 20180420 #08:28:22Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 103.196.17.0/24 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.17.0/24 descr: VNPOST origin: AS131438 mnt-by: MAINT-AS45903 changed: chuyen.lv [at] cmctelecom.vn 20180420 #08:28:46Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 103.196.17.0/24 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:45Z source: APNIC rpki-ov-state: valid route: 103.196.18.0/23 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:47Z source: APNIC rpki-ov-state: valid route: 103.196.18.0/23 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.18.0/23 descr: Proxy-registered route object origin: AS131438 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20180423 source: RADB last-modified: 2023-11-13T15:53:26Z rpki-ov-state: valid route: 103.196.18.0/24 descr: VNPOST origin: AS131438 mnt-by: MAINT-AS45903 changed: chuyen.lv [at] cmctelecom.vn 20180420 #08:29:12Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 103.196.18.0/24 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid route: 103.196.18.0/24 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:49Z source: APNIC rpki-ov-state: valid route: 103.196.19.0/24 descr: VNPOST origin: AS131438 mnt-by: MAINT-AS45903 changed: chuyen.lv [at] cmctelecom.vn 20180420 #08:29:40Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 103.196.19.0/24 descr: VNPOST-VN origin: AS131438 mnt-by: MAINT-VN-VNNIC last-modified: 2022-11-23T07:20:51Z source: APNIC rpki-ov-state: valid route: 103.196.19.0/24 descr: route object of VNPOST-VN origin: AS131438 remarks: this route is from customer of VIETTEL mnt-by: MAINT-VIETTEL changed: minhna4 [at] viettel.com.vn 20160908 source: NTTCOM rpki-ov-state: valid