mx.thearchivescorp.com has no NS records.
NS records for this zone are defined at thearchivescorp.com.
NS records for this zone are defined at thearchivescorp.com.
Question and response
Question
dig mx.thearchivescorp.com. NS
Answer
The response has no answer records.
Authority
thearchivescorp.com. 3600 SOA dns.thearchivescorp.com. hostmaster.thearchivescorp.com. 1450264412 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0