Apex domains cannot have CNAME records.
Question and response
Question
dig fernheimgsds.com. NS
Answer
fernheimgsds.com. 5 NS ns-1437.awsdns-51.org.
fernheimgsds.com. 5 NS ns-476.awsdns-59.com.
fernheimgsds.com. 5 NS ns-228.awsdns-28.com.
fernheimgsds.com. 5 NS ns-662.awsdns-18.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0