Apex domains cannot have CNAME records.
Question and response
Question
dig jcitahiti.com. NS
Answer
jcitahiti.com. 5 NS ns-827.awsdns-39.net.
jcitahiti.com. 5 NS ns-1538.awsdns-00.co.uk.
jcitahiti.com. 5 NS ns-371.awsdns-46.com.
jcitahiti.com. 5 NS ns-420.awsdns-52.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0