Apex domains cannot have CNAME records.
Question and response
Question
dig ebdcs.com. NS
Answer
ebdcs.com. 4 NS ns-1748.awsdns-26.co.uk.
ebdcs.com. 4 NS ns-116.awsdns-14.com.
ebdcs.com. 4 NS ns-645.awsdns-16.net.
ebdcs.com. 4 NS ns-1785.awsdns-31.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0