Apex domains cannot have CNAME records.
Question and response
Question
dig panteks.com. NS
Answer
panteks.com. 3 NS ns-2037.awsdns-62.co.uk.
panteks.com. 3 NS ns-415.awsdns-51.com.
panteks.com. 3 NS ns-499.awsdns-62.com.
panteks.com. 3 NS ns-1569.awsdns-04.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0