billing.columbus.te.ua has no NS records.
NS records for this zone are defined at columbus.te.ua.
NS records for this zone are defined at columbus.te.ua.
Question and response
Question
dig billing.columbus.te.ua. NS
Answer
The response has no answer records.
Authority
columbus.te.ua. 3600 SOA ns1.columbus.te.ua. noc.columbus.te.ua. 2021081618 86400 7200 604800 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0