Apex domains cannot have CNAME records.
Question and response
Question
dig allytech.com. NS
Answer
allytech.com. 5 NS ns1.dnscheck.com.ar.
allytech.com. 5 NS ns2.dnscheck.com.ar.
allytech.com. 5 NS ns1.allytech.com.
allytech.com. 5 NS ns2.allytech.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0