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 64fbf86eef3e94b0ee1f97a5a21a8c9b.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 .