Apex domains cannot have CNAME records.
Question and response
Question
dig allacher.com. NS
Answer
allacher.com. 5 NS dns1.proserver1.at.
allacher.com. 5 NS dns2.proserver1.at.
allacher.com. 5 NS dns3.proserver1.at.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0