transfer-source.secondary.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 transfer-source.secondary.net.ua. NS
Answer
The response has no answer records.
Authority
secondary.net.ua. 5226 SOA chinger.km.ua. hostmaster.secondary.net.ua. 2007102401 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0