ns.lviv.ua has no NS records.
NS records for this zone are defined at lviv.ua.
NS records for this zone are defined at lviv.ua.
Question and response
Question
dig ns.lviv.ua. NS
Answer
The response has no answer records.
Authority
lviv.ua. 86400 SOA zeta.uar.net. hostmaster.lviv.ua. 2026032210 21600 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0