These entries are queried from radb.net using whois, you can try my project getting these.
:AS133116 route: 203.28.115.0/24 origin: AS133116 descr: Kalgoorlie Consolidated Gold Mines Black Street mnt-by: MAINT-AU-GD200-AP last-modified: 2021-04-01T03:47:27Z source: APNIC rpki-ov-state: valid