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 uh17us501r56q28va3t4fkmv8q9rgm9o.resennet.dk is not the root of its zone.
Instead, try zone transfer on resennet.dk .
Instead, try zone transfer on resennet.dk .