gw6rd-c00000001.tun.ipv6.zsttk.net 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 gw6rd-c00000001.tun.ipv6.zsttk.net is not the root of its zone.
Instead, try zone transfer on ipv6.zsttk.net .