mail.SVYAZ-TELEKOM.RU has no NS records.
NS records for this zone are defined at SVYAZ-TELEKOM.RU.
NS records for this zone are defined at SVYAZ-TELEKOM.RU.
Question and response
Question
dig mail.SVYAZ-TELEKOM.RU. NS
Answer
The response has no answer records.
Authority
SVYAZ-TELEKOM.RU. 86400 SOA ns1.SVYAZ-TELEKOM.RU. hostmaster.sv-en.RU. 2026030400 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0