These entries are queried from radb.net using whois, you can try my project getting these.
:AS50883 route: 91.216.6.0/24 descr: NTH Primary Router origin: AS50883 mnt-by: MNT-IMS-ADMIN created: 2010-04-16T08:11:51Z last-modified: 2010-04-16T08:11:51Z 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: 178.216.112.0/21 descr: NTH Primary Route origin: AS50883 mnt-by: MNT-IMS-ADMIN created: 2010-04-16T08:14:52Z last-modified: 2010-04-16T08:14:52Z 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