Apex domains cannot have CNAME records.
Question and response
Question
dig brothergross.com. NS
Answer
brothergross.com. 5 NS ns-724.awsdns-26.net.
brothergross.com. 5 NS ns-1968.awsdns-54.co.uk.
brothergross.com. 5 NS ns-1392.awsdns-46.org.
brothergross.com. 5 NS ns-850.awsdns-42.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0