These entries are queried from radb.net using whois, you can try my project getting these.
:AS140864 route: 103.152.147.0/24 origin: AS140864 descr: Mihir Kumar Datta Hirok Mansion, 3rd floor, Rajbari municipality mnt-by: MAINT-RNLINK-BD last-modified: 2020-06-26T09:59:42Z source: APNIC rpki-ov-state: valid route6: 2001:df4:1480::/48 origin: AS140864 descr: Mihir Kumar Datta Hirok Mansion, 3rd floor, Rajbari municipality mnt-by: MAINT-RNLINK-BD last-modified: 2020-06-26T10:00:12Z source: APNIC rpki-ov-state: valid