These entries are queried from radb.net using whois, you can try my project getting these.
:AS139251 route: 103.140.98.0/23 origin: AS139251 descr: Jahangirnagar University Jahangirnagar University ICT-Cell Savar, Dhaka-1342 mnt-by: MAINT-JAHANGIRNAGAR-BD last-modified: 2019-08-19T04:32:00Z source: APNIC rpki-ov-state: valid route: 103.140.98.0/24 origin: AS139251 descr: Jahangirnagar University Jahangirnagar University ICT-Cell Savar, Dhaka-1342 mnt-by: MAINT-JAHANGIRNAGAR-BD last-modified: 2019-08-19T04:32:01Z source: APNIC rpki-ov-state: valid route: 103.140.99.0/24 origin: AS139251 descr: Jahangirnagar University Jahangirnagar University ICT-Cell Savar, Dhaka-1342 mnt-by: MAINT-JAHANGIRNAGAR-BD last-modified: 2019-08-19T04:32:02Z source: APNIC rpki-ov-state: valid route6: 2001:df0:b980::/48 origin: AS139251 descr: Jahangirnagar University Jahangirnagar University ICT-Cell Savar, Dhaka-1342 mnt-by: MAINT-JAHANGIRNAGAR-BD last-modified: 2019-10-17T09:56:02Z source: APNIC rpki-ov-state: valid