Apex domains cannot have CNAME records.
Question and response
Question
dig turetos.com. NS
Answer
turetos.com. 5 NS ns1.turetos.com.
turetos.com. 5 NS ns2.turetos.com.
Authority
The response has no authority records.
Additional
ns1.turetos.com. 5 A 54.38.177.150
ns2.turetos.com. 5 A 5.39.120.102
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0