These entries are queried from radb.net using whois, you can try my project getting these.
:AS132443 route: 103.73.56.0/24 origin: AS132443 descr: Southtech Limited Dhaka Square (4th & 5th Floor), Plot 1, Road 13, Sector 1, Uttara Model Town mnt-by: MAINT-SOUTHTECHLIMITED-BD last-modified: 2016-08-26T02:31:15Z source: APNIC rpki-ov-state: valid