swp56.core-a.thn.network.k.io 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 swp56.core-a.thn.network.k.io is not the root of its zone.
Instead, try zone transfer on network.k.io .