net-optus-au.optus.com.au IXFR zone transfer

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 net-optus-au.optus.com.au is not the root of its zone.
Instead, try zone transfer on optus.com.au .