email3.cog.lumata.com has no NS records.
NS records for this zone are defined at lumata.com.
NS records for this zone are defined at lumata.com.
Question and response
Question
dig email3.cog.lumata.com. NS
Answer
The response has no answer records.
Authority
lumata.com. 300 SOA ns.rackspace.com. hostmaster.rackspace.com. 1770116357 3600 300 1814400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0