Apex domains cannot have CNAME records.
Question and response
Question
dig suttonsylas.com. NS
Answer
suttonsylas.com. 5 NS ns-1596.awsdns-07.co.uk.
suttonsylas.com. 5 NS ns-1046.awsdns-02.org.
suttonsylas.com. 5 NS ns-237.awsdns-29.com.
suttonsylas.com. 5 NS ns-1640.awsdns-13.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0