ek01._domainkey.esigno.com has no NS records.
NS records for this zone are defined at esigno.com.
NS records for this zone are defined at esigno.com.
Question and response
Question
dig dkim.emailkampane.cz. NS
Answer
The response has no answer records.
Authority
emailkampane.cz. 1800 SOA ns1.zcom.cz. hostmaster.zcom.cz. 1774383145 10800 3600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0