These entries are queried from radb.net using whois, you can try my project getting these.
:AS150348 route: 103.16.250.0/23 descr: NCN BROADBAND mnt-lower: MAINT-NCNBROADBAND-BD mnt-routes: MAINT-NCNBROADBAND-BD country: BD origin: AS150348 mnt-by: MAINT-NCNBROADBAND-BD last-modified: 2022-10-15T12:15:37Z source: APNIC rpki-ov-state: valid route: 103.16.250.0/24 descr: NCN BROADBAND country: BD mnt-lower: MAINT-NCNBROADBAND-BD mnt-routes: MAINT-NCNBROADBAND-BD mnt-by: MAINT-NCNBROADBAND-BD origin: AS150348 last-modified: 2022-10-15T12:19:55Z source: APNIC rpki-ov-state: valid route: 103.16.251.0/24 descr: NCN BROADBAND country: BD mnt-lower: MAINT-NCNBROADBAND-BD mnt-routes: MAINT-NCNBROADBAND-BD mnt-by: MAINT-NCNBROADBAND-BD origin: AS150348 last-modified: 2022-10-15T12:18:52Z source: APNIC rpki-ov-state: valid route6: 2400:b360::/32 descr: NCN BROADBANDv6 country: BD mnt-lower: MAINT-NCNBROADBAND-BD mnt-routes: MAINT-NCNBROADBAND-BD mnt-by: MAINT-NCNBROADBAND-BD origin: AS150348 last-modified: 2022-10-15T12:22:17Z source: APNIC rpki-ov-state: valid