These entries are queried from radb.net using whois, you can try my project getting these.
:AS202121 route: 148.81.246.0/23 descr: Politechnika Warszawska Filia w Plocku origin: AS202121 mnt-by: NASK2-MNT created: 2014-04-03T14:04:20Z last-modified: 2014-04-03T14:04:20Z 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