mx2.atsgestion.com has no NS records.
NS records for this zone are defined at atsgestion.com.
NS records for this zone are defined at atsgestion.com.
Question and response
Question
dig mx2.atsgestion.com. NS
Answer
The response has no answer records.
Authority
atsgestion.com. 300 SOA ns1-auth.etb.net.co. postmaster.etb.net.co. 49 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0