Apex domains cannot have CNAME records.
Question and response
Question
dig wowdigitaladapter.com. NS
Answer
wowdigitaladapter.com. 5 NS ns-1721.awsdns-23.co.uk.
wowdigitaladapter.com. 5 NS ns-153.awsdns-19.com.
wowdigitaladapter.com. 5 NS ns-946.awsdns-54.net.
wowdigitaladapter.com. 5 NS ns-1209.awsdns-23.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0