Apex domains cannot have CNAME records.
Question and response
Question
dig inovelan.fr. NS
Answer
inovelan.fr. 5 NS puma.inovelan.fr.
inovelan.fr. 5 NS tigre.inovelan.fr.
Authority
The response has no authority records.
Additional
puma.inovelan.fr. 5 A 194.0.153.11
tigre.inovelan.fr. 5 A 194.0.153.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0