mail.valencic.si has no NS records.
NS records for this zone are defined at valencic.si.
NS records for this zone are defined at valencic.si.
Question and response
Question
dig mail.valencic.si. NS
Answer
The response has no answer records.
Authority
valencic.si. 300 SOA x1.si. dns.resolve.si. 54 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0