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 3APQ26O8417079I0C1SGD36LQFV8Q1J8.sfnet.com.br is not the root of its zone.
Instead, try zone transfer on sfnet.com.br .
Instead, try zone transfer on sfnet.com.br .