These entries are queried from radb.net using whois, you can try my project getting these.
:AS138408 route: 103.163.72.0/23 descr: NUSRATECH PTE LTD House: 23, Road: 12, Block: Kha, Psci Culture Housing, Dhaka Dhaka 1296 origin: AS138408 mnt-by: MAINT-NUSRATECHPTELTD-BD last-modified: 2021-04-12T04:31:57Z source: APNIC rpki-ov-state: valid route: 103.163.72.0/24 descr: NUSRATECH PTE LTD House: 23, Road: 12, Block: Kha, Psci Culture Housing, Dhaka Dhaka 1296 origin: AS138408 mnt-by: MAINT-NUSRATECHPTELTD-BD last-modified: 2021-04-16T09:16:10Z country: BD source: APNIC rpki-ov-state: valid route: 103.163.73.0/24 descr: NUSRATECH PTE LTD House: 23, Road: 12, Block: Kha, Psci Culture Housing, Dhaka Dhaka 1296 origin: AS138408 mnt-by: MAINT-NUSRATECHPTELTD-BD last-modified: 2021-04-12T04:32:20Z source: APNIC rpki-ov-state: valid route6: 2001:df6:7880::/48 descr: NUSRATECH PTE LTD House: 23, Road: 12, Block: Kha, Psci Culture Housing, Dhaka Dhaka 1296 origin: AS138408 mnt-by: MAINT-NUSRATECHPTELTD-BD last-modified: 2021-04-12T04:33:19Z source: APNIC rpki-ov-state: valid