ns2.fibraplus.net.br has no NS records.
NS records for this zone are defined at fibraplus.net.br.
NS records for this zone are defined at fibraplus.net.br.
Question and response
Question
dig ns2.fibraplus.net.br. NS
Answer
The response has no answer records.
Authority
fibraplus.net.br. 86400 SOA ns1.fibraplus.net.br. hostmaster.fibraplus.net.br. 738778511 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0