a3mail.se.se1.protection.inumbo.com has no NS records.
NS records for this zone are defined at inumbo.com.
NS records for this zone are defined at inumbo.com.
Question and response
Question
dig a3mail.se.se1.protection.inumbo.com. NS
Answer
The response has no answer records.
Authority
inumbo.com. 300 SOA ns.rackspace.com. info.halon.se. 1774011255 21600 3600 1814400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0