Apex domains cannot have CNAME records.
Question and response
Question
dig 0-6figures.com. NS
Answer
0-6figures.com. 5 NS ns-1742.awsdns-25.co.uk.
0-6figures.com. 5 NS ns-1198.awsdns-21.org.
0-6figures.com. 5 NS ns-547.awsdns-04.net.
0-6figures.com. 5 NS ns-1767.awsdns-28.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0