ns2-auth.viatel.net has no NS records.
NS records for this zone are defined at viatel.net.
NS records for this zone are defined at viatel.net.
Question and response
Question
dig ns2-auth.viatel.net. NS
Answer
The response has no answer records.
Authority
viatel.net. 600 SOA ns1-auth.viatel.net. hostmaster.viatel.net. 2023100201 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0