Apex domains cannot have CNAME records.
Question and response
Question
dig prepaidlegalcom.com. NS
Answer
prepaidlegalcom.com. 5 NS ns-1458.awsdns-54.org.
prepaidlegalcom.com. 5 NS ns-1026.awsdns-00.org.
prepaidlegalcom.com. 5 NS ns-1365.awsdns-42.org.
prepaidlegalcom.com. 5 NS ns-1542.awsdns-00.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0