Apex domains cannot have CNAME records.
Question and response
Question
dig ict.omantel.om. NS
Answer
ict.omantel.om. 5 NS ns1.odp-cloud.com.
ict.omantel.om. 5 NS ns2.odp-cloud.com.
Authority
The response has no authority records.
Additional
ns1.odp-cloud.com. 5 A 185.64.25.65
ns2.odp-cloud.com. 5 A 185.64.25.66
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0