dns2.artinfo.com.br has no NS records.
NS records for this zone are defined at artinfo.com.br.
NS records for this zone are defined at artinfo.com.br.
Question and response
Question
dig dns2.artinfo.com.br. NS
Answer
The response has no answer records.
Authority
artinfo.com.br. 3600 SOA dns1.kinghost.com.br. abuse.kinghost.net. 2504031018 86400 14400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0