mx2.faster.cz has no NS records.
NS records for this zone are defined at faster.cz.
NS records for this zone are defined at faster.cz.
Question and response
Question
dig mx2.faster.cz. NS
Answer
The response has no answer records.
Authority
faster.cz. 900 SOA inet.faster.cz. hostmaster.faster.cz. 2026022015 16384 2048 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0