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 49.pool85-60-35.dynamic.orange.es is not the root of its zone.
Instead, try zone transfer on pool85-60-35.dynamic.orange.es .
Instead, try zone transfer on pool85-60-35.dynamic.orange.es .