host-216-163-120-0.nrtc.net has no NS records.
NS records for this zone are defined at nrtc.net.
NS records for this zone are defined at nrtc.net.
Question and response
Question
dig host-216-163-120-0.nrtc.net. NS
Answer
The response has no answer records.
Authority
nrtc.net. 300 SOA dns1.nrtc.net. root.dns1.nrtc.net. 3070753216 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0