These entries are queried from radb.net using whois, you can try my project getting these.
:AS142021 route: 103.165.48.0/23 descr: National Board of Revenue (NBR), Bangladesh origin: AS142021 mnt-by: MAINT-NBORB-BD last-modified: 2021-03-29T08:39:50Z source: APNIC rpki-ov-state: valid route: 103.165.48.0/24 descr: National Board of Revenue (NBR), Bangladesh origin: AS142021 mnt-by: MAINT-NBORB-BD last-modified: 2021-03-29T08:41:36Z source: APNIC rpki-ov-state: valid route: 103.165.49.0/24 descr: National Board of Revenue (NBR), Bangladesh origin: AS142021 mnt-by: MAINT-NBORB-BD last-modified: 2021-03-29T08:42:50Z source: APNIC rpki-ov-state: valid