These entries are queried from radb.net using whois, you can try my project getting these.
:AS398935 route: 98.173.129.0/24 origin: AS398935 descr: Proxy route object registered by Flexential for customer mnt-by: MAINT-FLEXENTIAL changed: routing [at] viawest.net 20201117 #22:15:57Z source: RADB last-modified: 2023-11-13T16:03:00Z rpki-ov-state: valid