Apex domains cannot have CNAME records.
Question and response
Question
dig emailbazooka.com. NS
Answer
emailbazooka.com. 5 NS ns-875.awsdns-45.net.
emailbazooka.com. 5 NS ns-63.awsdns-07.com.
emailbazooka.com. 5 NS ns-255.awsdns-31.com.
emailbazooka.com. 5 NS ns-355.awsdns-44.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0