Apex domains cannot have CNAME records.
Question and response
Question
dig captiontext.com. NS
Answer
captiontext.com. 4 NS ns1.viawest.net.
captiontext.com. 4 NS ns2.viawest.net.
Authority
The response has no authority records.
Additional
ns1.viawest.net. 4 A 216.87.64.12
ns2.viawest.net. 4 A 209.170.216.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0