gw01.ctinet.com.br has no NS records.
NS records for this zone are defined at ctinet.com.br.
NS records for this zone are defined at ctinet.com.br.
Question and response
Question
dig gw01.ctinet.com.br. NS
Answer
The response has no answer records.
Authority
ctinet.com.br. 300 SOA dns1.ctitech.net.br. postmaster.ctitech.net.br. 2026030301 28800 3600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0