These entries are queried from radb.net using whois, you can try my project getting these.
:AS60973 route: 91.223.238.0/24 descr: ZUPO D.O.O. origin: AS60973 mnt-by: AS5603-MNT created: 2021-06-07T07:59:12Z last-modified: 2021-06-07T07:59:12Z 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: 91.237.33.0/24 descr: ZUPO D.O.O. origin: AS60973 mnt-by: AS5603-MNT mnt-by: AS9119-MNT created: 2013-04-09T09:16:18Z last-modified: 2013-04-09T09:16:18Z 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 route6: 2001:67c:1124::/48 descr: ZUPO D.O.O. origin: AS60973 mnt-by: AS5603-MNT mnt-by: AS9119-MNT created: 2016-11-07T14:58:03Z last-modified: 2016-11-07T14:58:03Z 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