mail1.sencinet.ar has no NS records.
NS records for this zone are defined at sencinet.ar.
NS records for this zone are defined at sencinet.ar.
Question and response
Question
dig mail1.sencinet.ar. NS
Answer
The response has no answer records.
Authority
sencinet.ar. 43200 SOA cobe.sencinet.ar. dns-adm.sencinet.ar. 2026012701 10800 3600 43200 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0