Apex domains cannot have CNAME records.
Question and response
Question
dig atturstlawrence.com. NS
Answer
atturstlawrence.com. 4 NS ns-2034.awsdns-62.co.uk.
atturstlawrence.com. 4 NS ns-1907.awsdns-46.co.uk.
atturstlawrence.com. 4 NS ns-192.awsdns-24.com.
atturstlawrence.com. 4 NS ns-1098.awsdns-09.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0