Apex domains cannot have CNAME records.
Question and response
Question
dig riverparishrealestate.com. NS
Answer
riverparishrealestate.com. 5 NS ns1.riverparishrealestate.com.
riverparishrealestate.com. 5 NS ns2.riverparishrealestate.com.
Authority
The response has no authority records.
Additional
ns1.riverparishrealestate.com. 5 A 107.6.154.106
ns2.riverparishrealestate.com. 5 A 107.6.154.108
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0