Apex domains cannot have CNAME records.
Question and response
Question
dig deteque.com. NS
Answer
deteque.com. 5 NS pdns2.ultradns.net.
deteque.com. 5 NS auth1.deteque.com.
deteque.com. 5 NS auth2.deteque.com.
deteque.com. 5 NS pdns5.ultradns.info.
deteque.com. 5 NS pdns6.ultradns.co.uk.
deteque.com. 5 NS pdns1.ultradns.net.
deteque.com. 5 NS pdns3.ultradns.org.
deteque.com. 5 NS pdns4.ultradns.org.
Authority
The response has no authority records.
Additional
auth1.deteque.com. 5 A 162.159.24.23
auth2.deteque.com. 5 A 162.159.25.133
auth1.deteque.com. 5 AAAA 2400:cb00:2049:1:0:0:a29f:1817
auth2.deteque.com. 5 AAAA 2400:cb00:2049:1:0:0:a29f:1985
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0