mx4.futureweb.org has no NS records.
NS records for this zone are defined at futureweb.org.
NS records for this zone are defined at futureweb.org.
Question and response
Question
dig mx4.futureweb.org. NS
Answer
The response has no answer records.
Authority
futureweb.org. 86400 SOA ns1.futureweb.at. hostmaster.futureweb.at. 2026020911 10800 3600 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0