srv5mcgrhml.oi.com.br has no NS records.
NS records for this zone are defined at oi.com.br.
NS records for this zone are defined at oi.com.br.
Question and response
Question
dig oi-hml-mip-gravacao.mobicare.com.br. NS
Answer
The response has no answer records.
Authority
mobicare.com.br. 300 SOA dns0.zoneedit.com. zone.zoneedit.com. 1772651045 43200 10800 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0