pgmail.unimedpr.coop.br has no NS records.
NS records for this zone are defined at unimedpr.coop.br.
NS records for this zone are defined at unimedpr.coop.br.
Question and response
Question
dig pgmail.unimedpr.coop.br. NS
Answer
The response has no answer records.
Authority
unimedpr.coop.br. 180 SOA ns20.digicertdns.com. dns.digicertdns.com. 2009012434 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0