These entries are queried from radb.net using whois, you can try my project getting these.
:AS139669 route: 103.143.47.0/24 descr: Youngones (CEPZ) Ltd.Banglades mnt-lower: MAINT-YCL-BD mnt-routes: MAINT-YCL-BD mnt-by: MAINT-YCL-BD origin: AS139669 last-modified: 2019-11-14T05:42:16Z source: APNIC rpki-ov-state: valid route: 103.144.69.0/24 descr: Youngones (CEPZ) Ltd.Banglades mnt-lower: MAINT-YCL-BD mnt-routes: MAINT-YCL-BD mnt-by: MAINT-YCL-BD origin: AS139669 last-modified: 2019-11-14T05:41:09Z source: APNIC rpki-ov-state: valid