ns3.itu.ch has no NS records.
NS records for this zone are defined at itu.ch.
NS records for this zone are defined at itu.ch.
Question and response
Question
dig ns3.itu.ch. NS
Answer
The response has no answer records.
Authority
itu.ch. 2700 SOA ns.itu.ch. hostmaster.itu.ch. 2026031201 1800 900 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0