Apex domains cannot have CNAME records.
Question and response
Question
dig justjoann.net. NS
Answer
justjoann.net. 5 NS ns2.justjoann.net.
justjoann.net. 5 NS ns1.justjoann.net.
Authority
The response has no authority records.
Additional
ns1.justjoann.net. 5 A 104.206.1.174
ns2.justjoann.net. 5 A 173.232.67.242
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0