mx.computercompanys.com has no NS records.
NS records for this zone are defined at computercompanys.com.
NS records for this zone are defined at computercompanys.com.
Question and response
Question
dig mx.computercompanys.com. NS
Answer
The response has no answer records.
Authority
computercompanys.com. 3600 SOA dns.computercompanys.com. hostmaster.computercompanys.com. 1834391194 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0