Apex domains cannot have CNAME records.
Question and response
Question
dig encirca-hosting.net. NS
Answer
encirca-hosting.net. 5 NS dnssec2.encirca.net.
encirca-hosting.net. 5 NS sec1.encirca.com.
encirca-hosting.net. 5 NS dnssec1.encirca.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0