These entries are queried from radb.net using whois, you can try my project getting these.
:AS138573 route: 103.133.184.0/22 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:19Z source: APNIC rpki-ov-state: valid route: 103.133.184.0/23 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:20Z source: APNIC rpki-ov-state: valid route: 103.133.184.0/24 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:21Z source: APNIC rpki-ov-state: valid route: 103.133.185.0/24 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:22Z source: APNIC rpki-ov-state: valid route: 103.133.186.0/23 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:23Z source: APNIC rpki-ov-state: valid route: 103.133.186.0/24 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:24Z source: APNIC rpki-ov-state: valid route: 103.133.187.0/24 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T06:04:25Z source: APNIC rpki-ov-state: valid route6: 2001:df7:a700::/48 origin: AS138573 descr: University of Barisal Kornokathi, Barisal-8200, Bangladesh mnt-by: MAINT-BU-BD last-modified: 2020-02-20T05:14:43Z source: APNIC rpki-ov-state: valid