mail.trans-telco.com has no NS records.
NS records for this zone are defined at trans-telco.com.
NS records for this zone are defined at trans-telco.com.
Question and response
Question
dig mail.trans-telco.com. NS
Answer
The response has no answer records.
Authority
trans-telco.com. 900 SOA ns1.telconet.net. abuse.telconet.net. 21 10800 3600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0