191.249.246.82.dynamic.adsl.gvt.net.br has no NS records.
NS records for this zone are defined at dynamic.adsl.gvt.net.br.
NS records for this zone are defined at dynamic.adsl.gvt.net.br.
Question and response
Question
dig 191.249.246.82.dynamic.adsl.gvt.net.br. NS
Answer
The response has no answer records.
Authority
dynamic.adsl.gvt.net.br. 21600 SOA dns1.gvt.net.br. operacao.gvt.net.br. 1497 28800 14400 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0