These entries are queried from radb.net using whois, you can try my project getting these.
:AS139296 route: 103.141.8.0/23 origin: AS139296 descr: Bangladesh Water Development Board Room No 306, WAPDA Building, Motijheel C/A, Dhaka, Bangladesh. mnt-by: MAINT-BWDB-BD last-modified: 2020-01-05T08:59:18Z source: APNIC rpki-ov-state: valid route: 103.141.8.0/24 origin: AS139296 descr: Bangladesh Water Development Board Room No 306, WAPDA Building, Motijheel C/A, Dhaka, Bangladesh. mnt-by: MAINT-BWDB-BD last-modified: 2020-01-09T05:11:22Z source: APNIC rpki-ov-state: valid route: 103.141.9.0/24 origin: AS139296 descr: Bangladesh Water Development Board Room No 306, WAPDA Building, Motijheel C/A, Dhaka, Bangladesh. mnt-by: MAINT-BWDB-BD last-modified: 2020-01-09T05:12:33Z source: APNIC rpki-ov-state: valid