These entries are queried from radb.net using whois, you can try my project getting these.
:AS150669 route: 103.51.52.0/24 origin: AS150669 descr: MOHAMMAD MAMUN College Road mnt-by: MAINT-SNC-BD last-modified: 2023-05-27T06:30:47Z source: APNIC rpki-ov-state: valid