smtp.oba.cz has no NS records.
NS records for this zone are defined at oba.cz.
NS records for this zone are defined at oba.cz.
Question and response
Question
dig smtp.oba.cz. NS
Answer
The response has no answer records.
Authority
oba.cz. 3600 SOA ns.forpsi.net. admin.forpsi.com. 2026031101 14400 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0