nsauth3.troycable.net has no NS records.
NS records for this zone are defined at troycable.net.
NS records for this zone are defined at troycable.net.
Question and response
Question
dig nsauth3.troycable.net. NS
Answer
The response has no answer records.
Authority
troycable.net. 10800 SOA nsauth1.troycable.net. hostmaster.troycable.net. 2021081901 43200 7200 1500000 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0