These entries are queried from radb.net using whois, you can try my project getting these.
:AS199131 route: 91.244.229.0/24 descr: City of York Council - PI origin: AS199131 mnt-by: JANET-HOSTMASTER created: 2012-09-03T12:32:34Z last-modified: 2012-09-03T12:32:34Z 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