Apex domains cannot have CNAME records.
Question and response
Question
dig myactv.net. NS
Answer
myactv.net. 5 NS ns1.myactv.net.
myactv.net. 5 NS ns-backup-ext.myactv.net.
myactv.net. 5 NS ns-east-ext.myactv.net.
myactv.net. 5 NS ns5.myactv.net.
Authority
The response has no authority records.
Additional
ns1.myactv.net. 5 A 24.89.0.57
ns5.myactv.net. 5 A 24.89.0.58
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0