These entries are queried from radb.net using whois, you can try my project getting these.
:AS15483 route: 159.148.160.0/24 descr: Sales.LV origin: AS15483 mnt-by: LATNET-MNT mnt-by: SALESLV-MNT mnt-by: AS2588-MNT created: 2016-01-14T14:17:58Z last-modified: 2016-01-14T14:17:58Z 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