These entries are queried from radb.net using whois, you can try my project getting these.
:AS24657 route: 81.18.96.0/20 descr: Dokumenta AG, Hamburg, AS1 origin: AS24657 mnt-by: DOKU-MNT created: 2002-02-26T13:45:03Z last-modified: 2002-02-26T13:45:03Z 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