host-wl0w8iw9b0c7ht.as15435-b.v6.dfn.nl IXFR zone transfer

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 host-wl0w8iw9b0c7ht.as15435-b.v6.dfn.nl is not the root of its zone.
Instead, try zone transfer on v6.dfn.nl .