Apex domains cannot have CNAME records.
Question and response
Question
dig netprestation.com. NS
Answer
netprestation.com. 5 NS ns2.nom-domaine.fr.
netprestation.com. 5 NS ns1.nom-domaine.fr.
Authority
The response has no authority records.
Additional
ns1.nom-domaine.fr. 5 A 46.105.50.13
ns2.nom-domaine.fr. 5 A 212.129.3.64
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0