Apex domains cannot have CNAME records.
Question and response
Question
dig centercode.com. NS
Answer
centercode.com. 5 NS ns-1734.awsdns-24.co.uk.
centercode.com. 5 NS ns-1144.awsdns-15.org.
centercode.com. 5 NS ns-452.awsdns-56.com.
centercode.com. 5 NS ns-725.awsdns-26.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0