Apex domains cannot have CNAME records.
Question and response
Question
dig stattranscriptionservicesinc.com. NS
Answer
stattranscriptionservicesinc.com. 4 NS ns-645.awsdns-16.net.
stattranscriptionservicesinc.com. 4 NS ns-1977.awsdns-55.co.uk.
stattranscriptionservicesinc.com. 4 NS ns-249.awsdns-31.com.
stattranscriptionservicesinc.com. 4 NS ns-1967.awsdns-53.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0