These entries are queried from radb.net using whois, you can try my project getting these.
:AS203728 route: 81.21.4.0/24 origin: AS203728 mnt-by: IPXO-MNT created: 2024-01-16T12:36:07Z last-modified: 2024-01-16T12:36:07Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 81.21.4.0/24 origin: AS203728 mnt-by: MAINT-AS834 descr: autogen changed: support [at] ipxo.com source: radb last-modified: 2024-01-17T08:46:25Z rpki-ov-state: valid route6: 2001:678:90c::/48 origin: AS203728 mnt-by: WITRYNA-MNT created: 2024-04-21T18:57:01Z last-modified: 2024-04-21T18:57:01Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid