Apex domains cannot have CNAME records.
Question and response
Question
dig pcdgs.com. NS
Answer
pcdgs.com. 1 NS ns2.pcdgs.com.
pcdgs.com. 1 NS ns1.pcdgs.com.
Authority
The response has no authority records.
Additional
ns1.pcdgs.com. 1 A 213.227.153.42
ns2.pcdgs.com. 1 A 213.227.153.45
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0