ns02.usf.edu.br has no NS records.
NS records for this zone are defined at usf.edu.br.
NS records for this zone are defined at usf.edu.br.
Question and response
Question
dig ns02.usf.edu.br. NS
Answer
The response has no answer records.
Authority
usf.edu.br. 3600 SOA ns1-34.azure-dns.com. hostmaster.franciscanos.net. 2016111492 1200 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0