These entries are queried from radb.net using whois, you can try my project getting these.
:AS141740 route: 103.163.50.0/23 origin: AS141740 descr: S M Shamsur Rahman 89, Syed Grand Centre, 12th floor, Room:1201/A,Uttara, Dhaka mnt-by: MAINT-VBC-BD last-modified: 2021-03-06T09:19:51Z country: BD remarks: ******** source: APNIC rpki-ov-state: valid route: 103.163.50.0/24 origin: AS141740 descr: S M Shamsur Rahman 89, Syed Grand Centre, 12th floor, Room:1201/A,Uttara, Dhaka mnt-by: MAINT-VBC-BD last-modified: 2021-03-06T09:20:15Z country: BD remarks: ******** source: APNIC rpki-ov-state: valid route: 103.163.51.0/24 origin: AS141740 descr: S M Shamsur Rahman 89, Syed Grand Centre, 12th floor, Room:1201/A,Uttara, Dhaka mnt-by: MAINT-VBC-BD last-modified: 2021-03-06T09:20:43Z country: BD remarks: ******** source: APNIC rpki-ov-state: valid