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 6k9c4k0i5p0scglr7d5jkomf7evahf3v.esbjerg-gods.dk is not the root of its zone.
Instead, try zone transfer on esbjerg-gods.dk .
Instead, try zone transfer on esbjerg-gods.dk .