AD9.ad.ucla.edu has no NS records.
NS records for this zone are defined at ad.ucla.edu.
NS records for this zone are defined at ad.ucla.edu.
Question and response
Question
dig AD9.ad.ucla.edu. NS
Answer
The response has no answer records.
Authority
ad.ucla.edu. 3600 SOA ad6.ad.ucla.edu. hostmaster.ad.ucla.edu. 211336 900 600 86400 3600
Additional
. 0 OPT ; payload 1224, xrcode 0, version 0, flags 0