Apex domains cannot have CNAME records.
Question and response
Question
dig dbelk.com. NS
Answer
dbelk.com. 5 NS ns-160.awsdns-20.com.
dbelk.com. 5 NS ns-1447.awsdns-52.org.
dbelk.com. 5 NS ns-763.awsdns-31.net.
dbelk.com. 5 NS ns-471.awsdns-58.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0