These entries are queried from radb.net using whois, you can try my project getting these.
:AS51838 route: 91.220.145.0/24 descr: route object origin: AS51838 created: 2010-11-24T16:38:15Z last-modified: 2010-12-05T09:31:48Z source: RIPE mnt-by: DU259-MNT 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