smtp1.csc.fi has no NS records.
NS records for this zone are defined at csc.fi.
NS records for this zone are defined at csc.fi.
Question and response
Question
dig smtp1.csc.fi. NS
Answer
The response has no answer records.
Authority
csc.fi. 900 SOA ns.funet.fi. hostmaster.funet.fi. 2026031120 10800 3600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0