mail.elementdesign.cz has no NS records.
NS records for this zone are defined at elementdesign.cz.
NS records for this zone are defined at elementdesign.cz.
Question and response
Question
dig mail.elementdesign.cz. NS
Answer
The response has no answer records.
Authority
elementdesign.cz. 3600 SOA ns1.tele3.cz. root.tele3.cz. 1770419853 28800 7200 1209600 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0