mail-virtual.gwtc.net has no NS records.
NS records for this zone are defined at gwtc.net.
NS records for this zone are defined at gwtc.net.
Question and response
Question
dig mail-virtual.gwtc.net. NS
Answer
The response has no answer records.
Authority
gwtc.net. 60 SOA ns1.gwtc.net. hostmaster.gwtc.net. 2025110401 3600 600 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0