mxcluster02.adacor.com has no NS records.
NS records for this zone are defined at adacor.com.
NS records for this zone are defined at adacor.com.
Question and response
Question
dig mxcluster02.adacor.com. NS
Answer
The response has no answer records.
Authority
adacor.com. 3600 SOA ns.europe.adacor.net. hostmaster.adacor.net. 2026021102 10000 1800 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0