These entries are queried from radb.net using whois, you can try my project getting these.
:AS50874 route: 91.142.131.0/24 descr: Kewill Service Logistics B.V. origin: AS50874 org: ORG-KSLB1-RIPE mnt-lower: OPENPEERING-MNT mnt-routes: OPENPEERING-MNT mnt-by: OPENPEERING-MNT created: 2010-04-13T14:18:33Z last-modified: 2010-04-13T14:18:33Z 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