Apex domains cannot have CNAME records.
Question and response
Question
dig pemsv27.net. NS
Answer
pemsv27.net. 5 NS ns-625.awsdns-14.net.
pemsv27.net. 5 NS ns-1563.awsdns-03.co.uk.
pemsv27.net. 5 NS ns-159.awsdns-19.com.
pemsv27.net. 5 NS ns-1334.awsdns-38.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0