Apex domains cannot have CNAME records.
Question and response
Question
dig urltemporal.com. NS
Answer
urltemporal.com. 4 NS dns1.servidoraweb.net.
urltemporal.com. 4 NS dns2.servidoraweb.net.
Authority
The response has no authority records.
Additional
dns1.servidoraweb.net. 4 A 167.250.4.4
dns2.servidoraweb.net. 4 A 158.69.231.253
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0