Apex domains cannot have CNAME records.
Question and response
Question
dig ddolddol.com. NS
Answer
ddolddol.com. 1 NS ns2.ddolddol.com.
ddolddol.com. 1 NS ns1.ddolddol.com.
Authority
The response has no authority records.
Additional
ns1.ddolddol.com. 1 A 66.181.45.153
ns2.ddolddol.com. 1 A 66.181.45.154
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0