These entries are queried from radb.net using whois, you can try my project getting these.
:AS139835 route: 103.145.246.0/23 descr: Puspita Telecom Bangladesh origin: AS139835 mnt-by: MAINT-MSPUSPITATELECOM-BD country: BD last-modified: 2019-12-03T09:39:35Z source: APNIC rpki-ov-state: valid route: 103.145.246.0/24 descr: Puspita Telecom origin: AS139835 mnt-by: MAINT-MSPUSPITATELECOM-BD country: BD last-modified: 2019-12-03T04:33:36Z source: APNIC rpki-ov-state: valid route: 103.145.247.0/24 descr: Puspita Telecom Bangladesh origin: AS139835 mnt-by: MAINT-MSPUSPITATELECOM-BD country: BD last-modified: 2019-12-03T04:37:15Z source: APNIC rpki-ov-state: valid route6: 2001:df2:3780::/48 descr: Puspita Telecom BANGLADESH origin: AS139835 mnt-by: MAINT-MSPUSPITATELECOM-BD country: BD last-modified: 2019-12-03T11:34:24Z source: APNIC rpki-ov-state: valid