Apex domains cannot have CNAME records.
Question and response
Question
dig elawnservice.com.mx. NS
Answer
elawnservice.com.mx. 4 NS ns1.elawnservice.com.mx.
elawnservice.com.mx. 4 NS ns2.elawnservice.com.mx.
Authority
The response has no authority records.
Additional
ns1.elawnservice.com.mx. 4 A 107.175.7.84
ns2.elawnservice.com.mx. 4 A 107.175.7.84
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0