These entries are queried from radb.net using whois, you can try my project getting these.
:AS63741 route: 103.51.120.0/23 descr: GNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2023-02-09T08:13:09Z source: APNIC rpki-ov-state: valid route: 103.51.120.0/24 descr: GNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2023-02-09T08:13:11Z source: APNIC rpki-ov-state: valid route: 103.51.121.0/24 descr: GNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2023-02-09T08:13:14Z source: APNIC rpki-ov-state: valid route: 103.216.72.0/22 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:09Z source: APNIC rpki-ov-state: valid route: 103.216.72.0/22 descr: Route register origin: AS63741 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] mobifoneglobal.vn changed: huyhq [at] mobifoneglobal.vn 20171203 source: NTTCOM rpki-ov-state: valid route: 103.216.72.0/22 origin: AS63741 descr: VNPT-NET mnt-by: MAINT-AS45899 changed: radb [at] vnpt.vn 20220429 #07:21:10Z source: RADB last-modified: 2023-11-13T16:10:57Z rpki-ov-state: valid route: 103.216.72.0/23 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:11Z source: APNIC rpki-ov-state: valid route: 103.216.72.0/24 descr: Route register origin: AS63741 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] mobifoneglobal.vn changed: huyhq [at] mobifoneglobal.vn 20171203 source: NTTCOM rpki-ov-state: valid route: 103.216.72.0/24 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:13Z source: APNIC rpki-ov-state: valid route: 103.216.73.0/24 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:15Z source: APNIC rpki-ov-state: valid route: 103.216.73.0/24 descr: Route register origin: AS63741 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] mobifoneglobal.vn changed: huyhq [at] mobifoneglobal.vn 20171129 source: NTTCOM rpki-ov-state: valid route: 103.216.74.0/23 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:18Z source: APNIC rpki-ov-state: valid route: 103.216.74.0/24 descr: Route register origin: AS63741 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] mobifoneglobal.vn changed: huyhq [at] mobifoneglobal.vn 20171129 source: NTTCOM rpki-ov-state: valid route: 103.216.74.0/24 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:20Z source: APNIC rpki-ov-state: valid route: 103.216.75.0/24 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:35:22Z source: APNIC rpki-ov-state: valid route: 103.216.75.0/24 descr: Route register origin: AS63741 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] mobifoneglobal.vn changed: huyhq [at] mobifoneglobal.vn 20171129 source: NTTCOM rpki-ov-state: valid route: 103.245.244.0/22 origin: AS63741 descr: VNPT-NET mnt-by: MAINT-AS45899 changed: radb [at] vnpt.vn 20220429 #07:16:03Z source: RADB last-modified: 2023-11-13T16:10:57Z rpki-ov-state: valid route: 103.245.244.0/22 descr: DCNET Telecommunication joint stock company descr: DCNET Telecommunication joint stock company origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2019-10-29T09:42:17Z source: APNIC rpki-ov-state: valid route: 103.245.244.0/23 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:09Z source: APNIC rpki-ov-state: valid route: 103.245.244.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:09Z source: APNIC rpki-ov-state: valid route: 103.245.245.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:10Z source: APNIC rpki-ov-state: valid route: 103.245.246.0/23 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:11Z source: APNIC rpki-ov-state: valid route: 103.245.246.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:11Z source: APNIC rpki-ov-state: valid route: 103.245.247.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:36:12Z source: APNIC rpki-ov-state: valid route: 203.167.8.0/22 descr: DCNET Telecommunication joint stock company descr: DCNET Telecommunication joint stock company origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2019-10-29T09:43:58Z source: APNIC rpki-ov-state: valid route: 203.167.8.0/22 descr: CMC Customer origin: AS63741 mnt-by: MAINT-AS45903 changed: hai.lp [at] cmctelecom.vn 20181130 #08:50:59Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 203.167.8.0/23 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:03Z source: APNIC rpki-ov-state: valid route: 203.167.8.0/24 descr: CMC Customer origin: AS63741 mnt-by: MAINT-AS45903 changed: hai.lp [at] cmctelecom.vn 20181130 #08:53:15Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 203.167.8.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:03Z source: APNIC rpki-ov-state: valid route: 203.167.9.0/24 descr: CMC customer origin: AS63741 mnt-by: MAINT-AS45903 changed: hai.lp [at] cmctelecom.vn 20181130 #08:53:48Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 203.167.9.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:04Z source: APNIC rpki-ov-state: valid route: 203.167.10.0/23 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:05Z source: APNIC rpki-ov-state: valid route: 203.167.10.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:05Z source: APNIC rpki-ov-state: valid route: 203.167.10.0/24 descr: CMC customer origin: AS63741 mnt-by: MAINT-AS45903 changed: hai.lp [at] cmctelecom.vn 20181130 #08:55:00Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 203.167.11.0/24 descr: CMC customer origin: AS63741 mnt-by: MAINT-AS45903 changed: hai.lp [at] cmctelecom.vn 20181130 #08:55:31Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route: 203.167.11.0/24 origin: AS63741 descr: Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi mnt-by: MAINT-VN-VNNIC last-modified: 2022-05-30T09:37:06Z source: APNIC rpki-ov-state: valid route6: 2404:ee80::/48 descr: DCNET origin: AS63741 mnt-by: MAINT-AS45903 changed: hung.nt2 [at] cmctelecom.vn 20181007 #03:11:28Z source: RADB last-modified: 2023-11-13T15:59:23Z rpki-ov-state: valid route6: 2404:ee80::/48 descr: DCNET-VN origin: AS63741 mnt-by: MAINT-VN-VNNIC last-modified: 2023-05-04T07:41:45Z source: APNIC rpki-ov-state: valid