ms2.ssmx.net has no NS records.
NS records for this zone are defined at ssmx.net.
NS records for this zone are defined at ssmx.net.
Question and response
Question
dig ms2.ssmx.net. NS
Answer
The response has no answer records.
Authority
ssmx.net. 1800 SOA igor.ns.cloudflare.com. dns.cloudflare.com. 2396599070 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0