Apex domains cannot have CNAME records.
Question and response
Question
dig designsbysybil.com. NS
Answer
designsbysybil.com. 5 NS ns-969.awsdns-57.net.
designsbysybil.com. 5 NS ns-360.awsdns-45.com.
designsbysybil.com. 5 NS ns-1252.awsdns-28.org.
designsbysybil.com. 5 NS ns-1029.awsdns-00.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0