Apex domains cannot have CNAME records.
Question and response
Question
dig 3foldsun.com. NS
Answer
3foldsun.com. 2 NS ns-1377.awsdns-44.org.
3foldsun.com. 2 NS ns-497.awsdns-62.com.
3foldsun.com. 2 NS ns-380.awsdns-47.com.
3foldsun.com. 2 NS ns-1801.awsdns-33.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0