These entries are queried from radb.net using whois, you can try my project getting these.
:AS51875 route: 91.220.106.0/24 descr: TOV SILVER-SERVICE origin: AS51875 mnt-by: SILVER-SERVICE-MNT created: 2014-06-11T14:31:18Z last-modified: 2014-06-11T14:31:18Z 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 route: 176.124.138.0/23 descr: SILVER-SERVICE Ltd origin: AS51875 mnt-by: SILVER-SERVICE-MNT created: 2012-09-12T09:14:30Z last-modified: 2014-12-12T08:48:45Z 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