Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain 93-51-18-197.ip299.fastwebnet.it is not the root of its zone.
Instead, try zone transfer on ip299.fastwebnet.it .
Instead, try zone transfer on ip299.fastwebnet.it .