These entries are queried from radb.net using whois, you can try my project getting these.
:AS149819 route: 103.187.12.0/23 descr: KASPER NETWORK country: BD mnt-lower: MAINT-KASPERNETWORK-BD mnt-routes: MAINT-KASPERNETWORK-BD origin: AS149819 mnt-by: MAINT-KASPERNETWORK-BD last-modified: 2022-06-08T11:04:54Z source: APNIC rpki-ov-state: valid route: 103.187.12.0/24 country: BD descr: KASPER_NETWORK_BD origin: AS149819 mnt-by: MAINT-KASPERNETWORK-BD last-modified: 2022-05-09T12:41:33Z mnt-lower: MAINT-KASPERNETWORK-BD mnt-routes: MAINT-KASPERNETWORK-BD source: APNIC rpki-ov-state: valid route: 103.187.13.0/24 descr: KASPER NETWORK country: BD mnt-lower: MAINT-KASPERNETWORK-BD mnt-routes: MAINT-KASPERNETWORK-BD mnt-by: MAINT-KASPERNETWORK-BD origin: AS149819 last-modified: 2022-06-08T10:47:40Z source: APNIC rpki-ov-state: valid