Apex domains cannot have CNAME records.
Question and response
Question
dig pimec.net. NS
Answer
pimec.net. 4 NS dns01.pimec.net.
pimec.net. 4 NS dns02.pimec.net.
Authority
The response has no authority records.
Additional
dns01.pimec.net. 4 A 145.239.35.41
dns02.pimec.net. 4 A 5.39.40.56
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0