Apex domains cannot have CNAME records.
Question and response
Question
dig perimetercenter.com. NS
Answer
perimetercenter.com. 5 NS ns3.perimetercenter.com.
perimetercenter.com. 5 NS ns4.perimetercenter.com.
perimetercenter.com. 5 NS ns1.anodynetech.com.
perimetercenter.com. 5 NS ns2.anodynetech.com.
perimetercenter.com. 5 NS ns2.perimetercenter.com.
perimetercenter.com. 5 NS ns1.perimetercenter.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0