Apex domains cannot have CNAME records.
Question and response
Question
dig tGTaCT.Com. NS
Answer
tGTaCT.Com. 5 NS n1.xundns.com.
tGTaCT.Com. 5 NS n2.xundns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0