mx2.artegic.net has no NS records.
NS records for this zone are defined at artegic.net.
NS records for this zone are defined at artegic.net.
Question and response
Question
dig mx2.artegic.net. NS
Answer
The response has no answer records.
Authority
artegic.net. 3600 SOA ns15.artegic.net. it.artegic.net. 2026022700 36000 3600 3600000 345600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0