a.nic.tv has no NS records.
NS records for this zone are defined at nic.tv.
NS records for this zone are defined at nic.tv.
Question and response
Question
dig a.nic.tv. NS
Answer
The response has no answer records.
Authority
nic.tv. 900 SOA a.nic.tv. admin.tldns.godaddy. 1773117828 1800 300 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0