These entries are queried from radb.net using whois, you can try my project getting these.
:AS146953 route: 103.172.38.0/24 origin: AS146953 descr: Md Mohsin Aziz 144/2-B, South Pirer Bagh, mirpur mnt-by: MAINT-TBC-BD last-modified: 2021-08-25T11:02:28Z source: APNIC rpki-ov-state: valid route6: 2407:cac0::/32 origin: AS146953 descr: Md Mohsin Aziz 144/2-B, South Pirer Bagh, mirpur mnt-by: MAINT-TBC-BD last-modified: 2021-08-25T09:52:29Z source: APNIC rpki-ov-state: valid