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 r201-217-145-68.ir-static.anteldata.net.uy is not the root of its zone.
Instead, try zone transfer on ir-static.anteldata.net.uy .
Instead, try zone transfer on ir-static.anteldata.net.uy .