Apex domains cannot have CNAME records.
Question and response
Question
dig revi.services. NS
Answer
revi.services. 5 NS ns4.gestiondecuenta.com.
revi.services. 5 NS ns2.gestiondecuenta.com.
revi.services. 5 NS ns.gestiondecuenta.com.
revi.services. 5 NS ns3.gestiondecuenta.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0