Apex domains cannot have CNAME records.
Question and response
Question
dig eldononline.org. NS
Answer
eldononline.org. 1 NS ns-1957.awsdns-52.co.uk.
eldononline.org. 1 NS ns-369.awsdns-46.com.
eldononline.org. 1 NS ns-424.awsdns-53.com.
eldononline.org. 1 NS ns-947.awsdns-54.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0