relay.cantv.net has no CNAME records.
Question and response
Question
dig relay.cantv.net. NS
Answer
The response has no answer records.
Authority
cantv.net. 10800 SOA ns1.cantv.net. hostmaster.cantv.net. 2026011300 86400 7200 2592000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0