cucm-exp-edge.voip.it.ucla.edu has no NS records.
NS records for this zone are defined at voip.it.ucla.edu.
NS records for this zone are defined at voip.it.ucla.edu.
Question and response
Question
dig cucm-exp-edge.voip.it.ucla.edu. NS
Answer
The response has no answer records.
Authority
voip.it.ucla.edu. 900 SOA ib00f2.csb1.ucla.net. hostmaster.ucla.edu. 150 10800 3600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0