smtp.topnet.com.mx has no NS records.
NS records for this zone are defined at topnet.com.mx.
NS records for this zone are defined at topnet.com.mx.
Question and response
Question
dig smtp.emailarray.com. NS
Answer
The response has no answer records.
Authority
emailarray.com. 60 SOA ns1.emailarray.com. postmaster.emailarray.com. 2026022602 60 3000 9999999 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0