mailcloud.trunkoz.com has no NS records.
NS records for this zone are defined at trunkoz.com.
NS records for this zone are defined at trunkoz.com.
Question and response
Question
dig mailcloud.trunkoz.com. NS
Answer
The response has no answer records.
Authority
trunkoz.com. 3600 SOA ns1.trunkoz.com. hostmaster.trunkoz.com. 2464 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0