Apex domains cannot have CNAME records.
Question and response
Question
dig guyberard.com. NS
Answer
guyberard.com. 5 NS ns1.guyberard.com.
guyberard.com. 5 NS ns2.guyberard.com.
Authority
The response has no authority records.
Additional
ns1.guyberard.com. 5 A 170.130.204.210
ns2.guyberard.com. 5 A 170.130.204.210
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0