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 30.212-142-145.static.clientes.euskaltel.es is not the root of its zone.
Instead, try zone transfer on clientes.euskaltel.es .
Instead, try zone transfer on clientes.euskaltel.es .