video.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 mozart.serveisweb.net. NS
Answer
The response has no answer records.
Authority
serveisweb.net. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1772012537 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0