Apex domains cannot have CNAME records.
Question and response
Question
dig interecm.com. NS
Answer
interecm.com. 2 NS ns10.localdns.com.
interecm.com. 2 NS ns11.localdns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0