host81-135-109-211.range81-135.btcentralplus.com 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 host81-135-109-211.range81-135.btcentralplus.com is not the root of its zone.
Instead, try zone transfer on range81-135.btcentralplus.com .