These entries are queried from radb.net using whois, you can try my project getting these.
:AS57304 route: 87.245.192.0/20 origin: AS57304 mnt-by: MNT-RUBYCOM mnt-by: MNT-RETNRU created: 2023-01-16T11:42:12Z last-modified: 2023-01-16T11:42:12Z 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: 139.45.224.0/19 origin: AS57304 mnt-by: MNT-RUBYCOM mnt-by: MNT-RETNRU created: 2023-01-16T11:42:48Z last-modified: 2023-01-16T11:42:48Z 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: 2a02:2d9::/32 origin: AS57304 mnt-by: MNT-RETN mnt-by: MNT-RUBYCOM mnt-by: MNT-RETNRU created: 2023-05-26T09:10:45Z last-modified: 2023-05-26T09:10:45Z 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