Apex domains cannot have CNAME records.
Question and response
Question
dig matamorosonline.com. NS
Answer
matamorosonline.com. 5 NS ns2.matamorosonline.com.
matamorosonline.com. 5 NS ns1.matamorosonline.com.
Authority
The response has no authority records.
Additional
ns1.matamorosonline.com. 5 A 157.254.12.122
ns2.matamorosonline.com. 5 A 51.77.72.95
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0