Apex domains cannot have CNAME records.
Question and response
Question
dig bnpparibas. NS
Answer
bnpparibas. 5 NS c0.nic.bnpparibas.
bnpparibas. 5 NS b0.nic.bnpparibas.
bnpparibas. 5 NS a0.nic.bnpparibas.
bnpparibas. 5 NS a2.nic.bnpparibas.
Authority
The response has no authority records.
Additional
a0.nic.bnpparibas. 169610 A 65.22.64.9
a2.nic.bnpparibas. 169610 A 65.22.67.9
b0.nic.bnpparibas. 169610 A 65.22.65.9
c0.nic.bnpparibas. 169610 A 65.22.66.9
a0.nic.bnpparibas. 169610 AAAA 2a01:8840:3e:0:0:0:0:9
a2.nic.bnpparibas. 169610 AAAA 2a01:8840:41:0:0:0:0:9
b0.nic.bnpparibas. 169610 AAAA 2a01:8840:3f:0:0:0:0:9
c0.nic.bnpparibas. 169610 AAAA 2a01:8840:40:0:0:0:0:9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0