Apex domains cannot have CNAME records.
Question and response
Question
dig illavit.com. NS
Answer
illavit.com. 4 NS ns-1738.awsdns-25.co.uk.
illavit.com. 4 NS ns-2026.awsdns-61.co.uk.
illavit.com. 4 NS ns-817.awsdns-38.net.
illavit.com. 4 NS ns-1704.awsdns-21.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0