legacy.uoc.edu has no NS records.
NS records for this zone are defined at uoc.edu.
NS records for this zone are defined at uoc.edu.
Question and response
Question
dig legacy.uoc.edu. NS
Answer
The response has no answer records.
Authority
uoc.edu. 900 SOA ns-620.awsdns-13.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0