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 5ck5im13tph1oo8gsmgopv90eptg72ho.scannet2.dk is not the root of its zone.
Instead, try zone transfer on scannet2.dk .
Instead, try zone transfer on scannet2.dk .