ns6.p200.dns.us-dcc-phoenix-1.oci.oraclerealm17.com. 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 ns6.p200.dns.us-dcc-phoenix-1.oci.oraclerealm17.com. is not the root of its zone.
Instead, try zone transfer on us-dcc-phoenix-1.oci.oraclerealm17.com .