Apex domains cannot have CNAME records.
Question and response
Question
dig flagstaffsuper8.com. NS
Answer
flagstaffsuper8.com. 5 NS ns-1017.awsdns-63.net.
flagstaffsuper8.com. 5 NS ns-1942.awsdns-50.co.uk.
flagstaffsuper8.com. 5 NS ns-149.awsdns-18.com.
flagstaffsuper8.com. 5 NS ns-929.awsdns-52.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0