Apex domains cannot have CNAME records.
Question and response
Question
dig cheapervoice.com. NS
Answer
cheapervoice.com. 5 NS ns1.cheapervoice.com.
cheapervoice.com. 5 NS ns2.cheapervoice.com.
Authority
The response has no authority records.
Additional
ns1.cheapervoice.com. 5 A 5.135.31.98
ns2.cheapervoice.com. 5 A 170.130.79.126
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0