Apex domains cannot have CNAME records.
Question and response
Question
dig enta.net. NS
Answer
enta.net. 5 NS ns-2005.awsdns-58.co.uk.
enta.net. 5 NS ns-962.awsdns-56.net.
enta.net. 5 NS ns-58.awsdns-07.com.
enta.net. 5 NS ns-1030.awsdns-00.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0