Apex domains cannot have CNAME records.
Question and response
Question
dig curtcpa.com. NS
Answer
curtcpa.com. 4 NS ns62.worldnic.com.
curtcpa.com. 4 NS ns61.worldnic.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0