Apex domains cannot have CNAME records.
Question and response
Question
dig iecc.com. NS
Answer
iecc.com. 5 NS sdn.iecc.com.
iecc.com. 5 NS osdn.services.net.
Authority
The response has no authority records.
Additional
sdn.iecc.com. 5 A 108.161.135.154
sdn.iecc.com. 5 AAAA 2606:4300:0:4:0:0:0:106e
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0