cpmail.nanonation.net has no NS records.
NS records for this zone are defined at nanonation.net.
NS records for this zone are defined at nanonation.net.
Question and response
Question
dig cpmail.nanonation.net. NS
Answer
The response has no answer records.
Authority
nanonation.net. 180 SOA ns10.digicertdns.com. dns.digicertdns.com. 2009010142 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0