Apex domains cannot have CNAME records.
Question and response
Question
dig enitel.net.ni. NS
Answer
enitel.net.ni. 5 NS ns.enitel.net.ni.
enitel.net.ni. 5 NS ns1.claro.com.hn.
enitel.net.ni. 5 NS ns2.enitel.net.ni.
Authority
The response has no authority records.
Additional
ns.enitel.net.ni. 5 A 200.62.64.1
ns.enitel.net.ni. 5 A 200.64.62.1
ns2.enitel.net.ni. 5 A 200.62.64.65
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0