204.61.108.131.portotelecom.net.br has no NS records.
NS records for this zone are defined at portotelecom.net.br.
NS records for this zone are defined at portotelecom.net.br.
Question and response
Question
dig 204.61.108.131.portotelecom.net.br. NS
Answer
The response has no answer records.
Authority
portotelecom.net.br. 3600 SOA dns1.kinghost.com.br. abuse.kinghost.net. 2308120671 86400 14400 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0