These entries are queried from radb.net using whois, you can try my project getting these.
:AS51633 route: 91.220.12.0/24 descr: NOVATEK-Chelyabinsk Ltd origin: AS51633 mnt-by: CHRG-MNT created: 2010-10-15T08:47:04Z last-modified: 2012-11-02T10:16:53Z 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