These entries are queried from radb.net using whois, you can try my project getting these.
:AS152126 route: 36.50.20.0/24 origin: AS152126 descr: Biman Bangladesh Airlines Limited IT Division, Head Office, Balaka,Kurmitola,Dhaka-1229 mnt-by: MAINT-BBAL-BD last-modified: 2023-12-11T04:12:26Z source: APNIC rpki-ov-state: valid