These entries are queried from radb.net using whois, you can try my project getting these.
:AS138198 route: 103.122.28.0/22 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2018-12-26T09:01:19Z source: APNIC rpki-ov-state: valid route: 103.122.28.0/23 origin: AS138198 descr: Bengal Broadband Limited 34,Kamal Ataturk Avenue,3rd Floor,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2021-09-10T14:02:10Z source: APNIC rpki-ov-state: valid route: 103.122.28.0/24 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2018-12-26T08:54:30Z source: APNIC rpki-ov-state: valid route: 103.122.29.0/24 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2018-12-26T08:55:32Z source: APNIC rpki-ov-state: valid route: 103.122.30.0/23 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2021-09-10T13:59:32Z source: APNIC rpki-ov-state: valid route: 103.122.30.0/24 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2018-12-26T08:59:17Z source: APNIC rpki-ov-state: valid route: 103.122.31.0/24 origin: AS138198 descr: Bengal Broadband Limited 22,Kamal Ataturk Avenue,2nd Floor Ataturk Tower,Banani. mnt-by: MAINT-BENGAL-BROADBAND-BD last-modified: 2018-12-26T08:59:43Z source: APNIC rpki-ov-state: valid