ns2.bvacom.fr has no CNAME records.
Question and response
Question
dig ns2.bvacom.fr. NS
Answer
The response has no answer records.
Authority
bvacom.fr. 600 SOA ns0.bvacom.net. hostmaster.bvacom.fr. 2009121300 3600 1000 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0