Apex domains cannot have CNAME records.
Question and response
Question
dig bvacom.fr. NS
Answer
bvacom.fr. 5 NS ns2.bvacom.fr.
bvacom.fr. 5 NS ns0.bvacom.net.
Authority
The response has no authority records.
Additional
ns0.bvacom.net. 5 A 207.192.69.27
ns2.bvacom.fr. 5 A 217.64.48.65
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0