Apex domains cannot have CNAME records.
Question and response
Question
dig redfrogsports.com. NS
Answer
redfrogsports.com. 5 NS ns-358.awsdns-44.com.
redfrogsports.com. 5 NS ns-159.awsdns-19.com.
redfrogsports.com. 5 NS ns-309.awsdns-38.com.
redfrogsports.com. 5 NS ns-573.awsdns-07.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0