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 oq64c6511uo0jdbgtsh9kc4o4s6p8r7a.itfservice.dk is not the root of its zone.
Instead, try zone transfer on itfservice.dk .
Instead, try zone transfer on itfservice.dk .