Apex domains cannot have CNAME records.
Question and response
Question
dig btfcc.com. NS
Answer
btfcc.com. 5 NS ns-1874.awsdns-42.co.uk.
btfcc.com. 5 NS ns-1230.awsdns-25.org.
btfcc.com. 5 NS ns-1445.awsdns-52.org.
btfcc.com. 5 NS ns-1456.awsdns-54.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0