These entries are queried from radb.net using whois, you can try my project getting these.
:AS133890 route: 103.46.148.0/22 descr: Route Object origin: AS133890 mnt-by: MAINT-BANGLADESHARMY-BD country: BD last-modified: 2014-12-17T04:17:22Z source: APNIC rpki-ov-state: valid route: 103.46.148.0/23 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2018-11-26T06:59:19Z source: APNIC rpki-ov-state: valid route: 103.46.148.0/24 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2021-06-01T05:26:22Z source: APNIC rpki-ov-state: valid route: 103.46.149.0/24 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2021-06-01T05:26:37Z source: APNIC rpki-ov-state: valid route: 103.46.150.0/23 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2018-11-26T06:55:38Z source: APNIC rpki-ov-state: valid route: 103.46.150.0/24 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2021-06-01T05:27:17Z source: APNIC rpki-ov-state: valid route: 103.46.151.0/24 origin: AS133890 descr: Bangladesh Army AHQ, Dhaka Cantonment mnt-by: MAINT-BANGLADESHARMY-BD last-modified: 2021-06-01T05:27:00Z source: APNIC rpki-ov-state: valid route6: 2001:df1:a400::/48 descr: Router Object origin: AS133890 mnt-by: MAINT-BANGLADESHARMY-BD country: BD last-modified: 2014-12-17T04:19:17Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source