Apex domains cannot have CNAME records.
Question and response
Question
dig delldatasafe.com. NS
Answer
delldatasafe.com. 1 NS dns1.safenames.com.
delldatasafe.com. 1 NS dns2.safenames.net.
delldatasafe.com. 1 NS dns3.safenames.org.
Authority
The response has no authority records.
Additional
dns1.safenames.com. 1 A 185.191.160.1
dns1.safenames.com. 1 AAAA 2a00:a900:8afe:10:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0