Apex domains cannot have CNAME records.
Question and response
Question
dig piherc.com. NS
Answer
piherc.com. 4 NS ns1.piherc.com.
piherc.com. 4 NS ns2.piherc.com.
Authority
The response has no authority records.
Additional
ns1.piherc.com. 4 A 103.249.31.5
ns2.piherc.com. 4 A 38.126.208.92
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0