bounce.emservice.cz has no NS records.
NS records for this zone are defined at emservice.cz.
NS records for this zone are defined at emservice.cz.
Question and response
Question
dig bounce.emservice.cz. NS
Answer
The response has no answer records.
Authority
emservice.cz. 900 SOA ns-1478.awsdns-56.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0