_sips._tcp.kamensktel.ru has no NS records.
NS records for this zone are defined at kamensktel.ru.
NS records for this zone are defined at kamensktel.ru.
Question and response
Question
dig _sips._tcp.kamensktel.ru. NS
Answer
The response has no answer records.
Authority
kamensktel.ru. 300 SOA ns1.kamensktel.ru. admin.kamensktel.ru. 2026032202 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0