Apex domains cannot have CNAME records.
Question and response
Question
dig teamsupport.com. NS
Answer
teamsupport.com. 5 NS ns-400.awsdns-50.com.
teamsupport.com. 5 NS ns-821.awsdns-38.net.
teamsupport.com. 5 NS ns-1452.awsdns-53.org.
teamsupport.com. 5 NS ns-1610.awsdns-09.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0