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 o-oo.oo-o-oo.ooo is not the root of its zone.
Instead, try zone transfer on oo-o-oo.ooo .
Instead, try zone transfer on oo-o-oo.ooo .