Apex domains cannot have CNAME records.
Question and response
Question
dig walkerinfo.com. NS
Answer
walkerinfo.com. 3 NS ns-1127.awsdns-12.org.
walkerinfo.com. 3 NS ns-2023.awsdns-60.co.uk.
walkerinfo.com. 3 NS ns-134.awsdns-16.com.
walkerinfo.com. 3 NS ns-869.awsdns-44.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0