relay2.ttk.ru has no NS records.
NS records for this zone are defined at ttk.ru.
NS records for this zone are defined at ttk.ru.
Question and response
Question
dig relay2.ttk.ru. NS
Answer
The response has no answer records.
Authority
ttk.ru. 3600 SOA dns-prim.transtk.ru. nsmaster.transtk.ru. 2026031101 10800 900 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0