ns1.net.ua has no NS records.
NS records for this zone are defined at net.ua.
NS records for this zone are defined at net.ua.
Question and response
Question
dig ns1.net.ua. NS
Answer
The response has no answer records.
Authority
net.ua. 1800 SOA ho1.net.ua. info.eunic.net.ua. 2603120925 3600 1800 1814400 1800
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0