Apex domains cannot have CNAME records.
Question and response
Question
dig super-altegos.com. NS
Answer
super-altegos.com. 5 NS ns-1342.awsdns-39.org.
super-altegos.com. 5 NS ns-1049.awsdns-03.org.
super-altegos.com. 5 NS ns-39.awsdns-04.com.
super-altegos.com. 5 NS ns-287.awsdns-35.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0