Apex domains cannot have CNAME records.
Question and response
Question
dig andorpac.ad. NS
Answer
andorpac.ad. 5 NS ns2.andorratelecom.ad.
andorpac.ad. 5 NS ns1.andorratelecom.ad.
Authority
The response has no authority records.
Additional
ns1.andorratelecom.ad. 5 A 185.132.200.21
ns2.andorratelecom.ad. 5 A 185.132.200.22
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0