Apex domains cannot have CNAME records.
Question and response
Question
dig anodynetech.com. NS
Answer
anodynetech.com. 4 NS ns4.perimetercenter.com.
anodynetech.com. 4 NS ns1.anodynetech.com.
anodynetech.com. 4 NS ns1.perimetercenter.com.
anodynetech.com. 4 NS ns2.anodynetech.com.
anodynetech.com. 4 NS ns2.perimetercenter.com.
anodynetech.com. 4 NS ns3.perimetercenter.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0