Apex domains cannot have CNAME records.
Question and response
Question
dig wddonline.com. NS
Answer
wddonline.com. 5 NS ns-49.awsdns-06.com.
wddonline.com. 5 NS ns-1200.awsdns-22.org.
wddonline.com. 5 NS ns-1004.awsdns-61.net.
wddonline.com. 5 NS ns-1848.awsdns-39.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0