mxg2.impsat.com.ar has no NS records.
NS records for this zone are defined at impsat.com.ar.
NS records for this zone are defined at impsat.com.ar.
Question and response
Question
dig mxg2.impsat.com.ar. NS
Answer
The response has no answer records.
Authority
impsat.com.ar. 21600 SOA ns1.gblx.net.ar. hostmaster.impsat.net.ar. 2201103001 7200 3600 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0