Apex domains cannot have CNAME records.
Question and response
Question
dig 4me.com. NS
Answer
4me.com. 5 NS ns-1997.awsdns-57.co.uk.
4me.com. 5 NS ns-1269.awsdns-30.org.
4me.com. 5 NS ns-103.awsdns-12.com.
4me.com. 5 NS ns-702.awsdns-23.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0