dns2.cableworld.tv has no CNAME records.
Question and response
Question
dig dns2.cableworld.tv. NS
Answer
The response has no answer records.
Authority
cableworld.tv. 10800 SOA ns1.registrodns.com. info.banthar.net. 2026022707 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0