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 48da86c44f81b001bac1311ae03b7294.conectinfo.net.br is not the root of its zone.
Instead, try zone transfer on conectinfo.net.br .
Instead, try zone transfer on conectinfo.net.br .