These entries are queried from radb.net using whois, you can try my project getting these.
:AS137812 route: 103.228.201.0/24 origin: AS137812 descr: RMG Sustainability Council (RSC-BD.ORG) mnt-by: MAINT-KK-BD last-modified: 2024-01-30T09:10:46Z source: APNIC rpki-ov-state: valid