These entries are queried from radb.net using whois, you can try my project getting these.
:AS140626 route6: 2001:df3:ab80::/48 origin: AS140626 descr: Md Fahim Sakar Dhokkin Rajnagor, Rangamatia, Kaliganj, Gazipur, mnt-by: MAINT-KOS-BD last-modified: 2020-05-08T08:41:32Z source: APNIC rpki-ov-state: valid