Apex domains cannot have CNAME records.
Question and response
Question
dig loquenosabias.cloudns.cc. NS
Answer
loquenosabias.cloudns.cc. 5 NS ns24.cloudns.net.
loquenosabias.cloudns.cc. 5 NS ns23.cloudns.net.
loquenosabias.cloudns.cc. 5 NS ns21.cloudns.net.
loquenosabias.cloudns.cc. 5 NS ns22.cloudns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0