These entries are queried from radb.net using whois, you can try my project getting these.
:AS139881 route: 103.146.150.0/24 origin: AS139881 descr: Kayum Munshi 53/A, Satish Sarkar Road, Ganderia. mnt-by: MAINT-BDMINTERNET-BD last-modified: 2021-01-10T14:11:03Z source: APNIC rpki-ov-state: valid route: 103.146.151.0/24 descr: Kayum Munshi 53/A, Satish Sarkar Road, Ganderia. origin: AS139881 mnt-by: MAINT-BDMINTERNET-BD last-modified: 2024-03-27T10:25:50Z source: APNIC rpki-ov-state: valid route6: 2001:df2:6580::/48 origin: AS139881 descr: Kayum Munshi 53/A, Satish Sarkar Road, Ganderia. mnt-by: MAINT-BDMINTERNET-BD last-modified: 2023-04-03T13:25:18Z source: APNIC rpki-ov-state: valid