These entries are queried from radb.net using whois, you can try my project getting these.
:AS138497 route6: 2404:18c0::/32 origin: AS138497 descr: Ismail Hosain Russel 45/4,Ground Floor,Gonoktuli Lane,Hazaribagh,Dhaka mnt-by: MAINT-WEBSOLUTION-BD last-modified: 2021-02-17T12:53:36Z source: APNIC rpki-ov-state: valid