Apex domains cannot have CNAME records.
Question and response
Question
dig echoes.net. NS
Answer
echoes.net. 5 NS ns2.echoes.net.
echoes.net. 5 NS ns1.echoes.net.
Authority
The response has no authority records.
Additional
ns1.echoes.net. 5 A 72.28.3.5
ns2.echoes.net. 5 A 72.28.3.6
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0