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