2a01cb04204000020000000000000001.ipv6.abo.wanadoo.fr 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 2a01cb04204000020000000000000001.ipv6.abo.wanadoo.fr is not the root of its zone.
Instead, try zone transfer on ipv6.abo.wanadoo.fr .