These entries are queried from radb.net using whois, you can try my project getting these.
:AS57975 route: 146.120.240.0/24 origin: AS57975 mnt-by: RIPE-DB-MNT created: 2023-04-28T04:47:24Z last-modified: 2023-04-28T04:47:24Z 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: 146.158.15.0/24 origin: AS57975 mnt-by: RIPE-DB-MNT created: 2023-01-27T13:32:24Z last-modified: 2023-01-27T13:32:24Z 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