smtp2.ddc.teliasonera.net has no NS records.
NS records for this zone are defined at ddc.teliasonera.net.
NS records for this zone are defined at ddc.teliasonera.net.
Question and response
Question
dig smtp2.ddc.teliasonera.net. NS
Answer
The response has no answer records.
Authority
ddc.teliasonera.net. 3600 SOA dns.ddc.teliasonera.net. dns.telia.net. 2026031840 900 300 31536000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0