These entries are queried from radb.net using whois, you can try my project getting these.
:AS149774 route6: 2400:6c60::/32 origin: AS149774 descr: Md Mostafa Zaman Plot:15, Borun Bhaban, Gulshan-2 mnt-by: MAINT-VIATECH-BD last-modified: 2022-12-04T12:10:41Z source: APNIC rpki-ov-state: valid