Apex domains cannot have CNAME records.
Question and response
Question
dig gregando.com. NS
Answer
gregando.com. 3 NS ns-1617.awsdns-10.co.uk.
gregando.com. 3 NS ns-567.awsdns-06.net.
gregando.com. 3 NS ns-303.awsdns-37.com.
gregando.com. 3 NS ns-2034.awsdns-62.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0