serv-me.klar.es.eu.org IXFR zone transfer

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 serv-me.klar.es.eu.org is not the root of its zone.
Instead, try zone transfer on klar.es.eu.org .