b.nic.TV has no CNAME records.
Question and response
Question
dig b.nic.TV. NS
Answer
The response has no answer records.
Authority
nic.tv. 469 SOA a.nic.tv. admin.tldns.godaddy. 1772757827 1800 300 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0