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 jc2emmnatmluspi31uq1b2l2q15l5l4a.comtecint.dk is not the root of its zone.
Instead, try zone transfer on comtecint.dk .
Instead, try zone transfer on comtecint.dk .