Apex domains cannot have CNAME records.
Question and response
Question
dig us-visalaw.com. NS
Answer
us-visalaw.com. 5 NS ns-981.awsdns-58.net.
us-visalaw.com. 5 NS ns-578.awsdns-08.net.
us-visalaw.com. 5 NS ns-731.awsdns-27.net.
us-visalaw.com. 5 NS ns-1998.awsdns-57.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0