These entries are queried from radb.net using whois, you can try my project getting these.
:AS149633 route: 103.183.16.0/23 origin: AS149633 descr: Md.Safouir Uddin 87, BNS Center, Sector-7 mnt-by: MAINT-TURAGNET-BD last-modified: 2022-03-10T09:03:10Z source: APNIC rpki-ov-state: valid route: 103.183.16.0/24 origin: AS149633 descr: Md.Safouir Uddin 87, BNS Center, Sector-7 mnt-by: MAINT-TURAGNET-BD last-modified: 2022-03-10T08:55:35Z source: APNIC rpki-ov-state: valid route: 103.183.17.0/24 origin: AS149633 descr: Md.Safouir Uddin 87, BNS Center, Sector-7 mnt-by: MAINT-TURAGNET-BD last-modified: 2022-03-10T08:56:18Z source: APNIC rpki-ov-state: valid