Apex domains cannot have CNAME records.
Question and response
Question
dig tldns.godaddy. NS
Answer
tldns.godaddy. 5 NS c.tldns.godaddy.
tldns.godaddy. 5 NS b.tldns.godaddy.
tldns.godaddy. 5 NS a.tldns.godaddy.
tldns.godaddy. 5 NS d.tldns.godaddy.
Authority
The response has no authority records.
Additional
a.tldns.godaddy. 5 A 37.209.192.2
b.tldns.godaddy. 5 A 37.209.194.2
c.tldns.godaddy. 5 A 37.209.196.2
d.tldns.godaddy. 5 A 37.209.198.2
a.tldns.godaddy. 5 AAAA 2001:dcd:1:0:0:0:0:2
b.tldns.godaddy. 5 AAAA 2001:dcd:2:0:0:0:0:2
c.tldns.godaddy. 5 AAAA 2001:dcd:3:0:0:0:0:2
d.tldns.godaddy. 5 AAAA 2001:dcd:4:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0