Apex domains cannot have CNAME records.
Question and response
Question
dig me-ibri-1.oci.oraclerealm9.com. NS
Answer
me-ibri-1.oci.oraclerealm9.com. 5 NS ns4.p200.dns.me-ibri-1.oci.oraclerealm9.com.
me-ibri-1.oci.oraclerealm9.com. 5 NS ns3.p200.dns.me-ibri-1.oci.oraclerealm9.com.
me-ibri-1.oci.oraclerealm9.com. 5 NS ns6.p200.dns.me-ibri-1.oci.oraclerealm9.com.
me-ibri-1.oci.oraclerealm9.com. 5 NS ns1.p200.dns.me-ibri-1.oci.oraclerealm9.com.
me-ibri-1.oci.oraclerealm9.com. 5 NS ns2.p200.dns.me-ibri-1.oci.oraclerealm9.com.
me-ibri-1.oci.oraclerealm9.com. 5 NS ns5.p200.dns.me-ibri-1.oci.oraclerealm9.com.
Authority
The response has no authority records.
Additional
ns1.p200.dns.me-ibri-1.oci.oraclerealm9.com. 4 A 84.8.55.0
ns2.p200.dns.me-ibri-1.oci.oraclerealm9.com. 4 A 84.8.51.114
ns3.p200.dns.me-ibri-1.oci.oraclerealm9.com. 4 A 84.8.37.66
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0