Apex domains cannot have CNAME records.
Question and response
Question
dig richardlanningbuilders.com. NS
Answer
richardlanningbuilders.com. 5 NS ns2.richardlanningbuilders.com.
richardlanningbuilders.com. 5 NS ns1.richardlanningbuilders.com.
Authority
The response has no authority records.
Additional
ns1.richardlanningbuilders.com. 5 A 192.227.124.180
ns2.richardlanningbuilders.com. 5 A 31.57.36.16
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0