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 libont67t3f7fnqvik8s7fcg0ica1e8u.webexchange.nu is not the root of its zone.
Instead, try zone transfer on webexchange.nu .
Instead, try zone transfer on webexchange.nu .