Apex domains cannot have CNAME records.
Question and response
Question
dig greffe-cheveux-maroc.com. NS
Answer
greffe-cheveux-maroc.com. 5 NS ns-1508.awsdns-60.org.
greffe-cheveux-maroc.com. 5 NS ns-1440.awsdns-52.org.
greffe-cheveux-maroc.com. 5 NS ns-419.awsdns-52.com.
greffe-cheveux-maroc.com. 5 NS ns-1552.awsdns-02.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0