Apex domains cannot have CNAME records.
Question and response
Question
dig roundrockteam.com. NS
Answer
roundrockteam.com. 5 NS ns-1615.awsdns-09.co.uk.
roundrockteam.com. 5 NS ns-1783.awsdns-30.co.uk.
roundrockteam.com. 5 NS ns-1858.awsdns-40.co.uk.
roundrockteam.com. 5 NS ns-1410.awsdns-48.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0