These entries are queried from radb.net using whois, you can try my project getting these.
:AS62446 route: 91.197.57.0/24 origin: AS62446 mnt-by: NIKATELECOM-MNT created: 2017-05-05T12:04:05Z last-modified: 2017-05-05T12:20:09Z 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