These entries are queried from radb.net using whois, you can try my project getting these.
:AS135908 route: 103.82.196.0/22 descr: ECONET-VN origin: AS135908 mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-28T00:55:35Z source: APNIC rpki-ov-state: valid route: 103.82.196.0/23 origin: AS135908 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: 2021-09-29T02:27:41Z source: APNIC rpki-ov-state: valid route: 103.82.196.0/24 origin: AS135908 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: 2021-09-29T02:27:43Z source: APNIC rpki-ov-state: valid route: 103.82.197.0/24 descr: Econet origin: AS135908 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170331 #11:39:41Z source: RADB last-modified: 2023-11-13T15:50:56Z rpki-ov-state: valid route: 103.82.197.0/24 origin: AS135908 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: 2021-09-29T02:27:44Z source: APNIC rpki-ov-state: valid route: 103.82.198.0/23 origin: AS135908 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: 2021-09-29T02:27:45Z source: APNIC rpki-ov-state: valid route: 103.82.198.0/24 descr: Econet origin: AS135908 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170331 #11:40:13Z source: RADB last-modified: 2023-11-13T15:50:56Z rpki-ov-state: valid route: 103.82.198.0/24 origin: AS135908 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: 2021-09-29T02:27:47Z source: APNIC rpki-ov-state: valid route: 103.82.199.0/24 descr: Econet origin: AS135908 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20170331 #11:40:41Z source: RADB last-modified: 2023-11-13T15:50:56Z rpki-ov-state: valid route: 103.82.199.0/24 origin: AS135908 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: 2021-09-29T02:27:48Z source: APNIC rpki-ov-state: valid route6: 2001:df6:2200::/48 descr: ASVTECH-VN origin: AS135908 mnt-by: MAINT-VN-VNNIC last-modified: 2021-09-29T00:48:50Z source: APNIC rpki-ov-state: valid