cvmad04.cvm.tamu.edu has no NS records.
NS records for this zone are defined at cvm.tamu.edu.
NS records for this zone are defined at cvm.tamu.edu.
Question and response
Question
dig cvmad04.cvm.tamu.edu. NS
Answer
The response has no answer records.
Authority
cvm.tamu.edu. 900 SOA ns1.tamu.edu. infoblox.tamu.edu. 9751 14400 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0