These entries are queried from radb.net using whois, you can try my project getting these.
:AS139643 route: 103.143.0.0/24 origin: AS139643 descr: Ashraful Haque 2B, KDA AVENUE , 6TH FLOOR , TRIBUNE TOWER mnt-by: MAINT-I-SMART-BD last-modified: 2019-10-02T15:51:45Z source: APNIC rpki-ov-state: valid route: 103.143.1.0/24 origin: AS139643 descr: Ashraful Haque 2B, KDA AVENUE , 6TH FLOOR , TRIBUNE TOWER mnt-by: MAINT-I-SMART-BD last-modified: 2019-10-02T15:52:46Z source: APNIC rpki-ov-state: valid route6: 2001:df1:6480::/48 origin: AS139643 descr: Ashraful Haque 2B, KDA AVENUE , 6TH FLOOR , TRIBUNE TOWER mnt-by: MAINT-I-SMART-BD last-modified: 2023-08-06T05:49:41Z source: APNIC rpki-ov-state: valid