Apex domains cannot have CNAME records.
Question and response
Question
dig actionchannels.com. NS
Answer
actionchannels.com. 1 NS ns-1927.awsdns-48.co.uk.
actionchannels.com. 1 NS ns-1970.awsdns-54.co.uk.
actionchannels.com. 1 NS ns-1198.awsdns-21.org.
actionchannels.com. 1 NS ns-1681.awsdns-18.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0