Apex domains cannot have CNAME records.
Question and response
Question
dig intelliworxit.com. NS
Answer
intelliworxit.com. 5 NS ns-608.awsdns-12.net.
intelliworxit.com. 5 NS ns-2042.awsdns-63.co.uk.
intelliworxit.com. 5 NS ns-106.awsdns-13.com.
intelliworxit.com. 5 NS ns-1373.awsdns-43.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0