These entries are queried from radb.net using whois, you can try my project getting these.
:AS199936 route: 31.131.48.0/20 descr: Uniwersytet Przyrodniczy w Lublinie origin: AS199936 mnt-by: UP-LUBLIN-PL created: 2014-02-07T07:04:12Z last-modified: 2014-02-07T07:04:12Z 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: not_found # No ROAs found, or RPKI validation not enabled for source