mail.gazpromtelecom.ru has no NS records.
NS records for this zone are defined at gazpromtelecom.ru.
NS records for this zone are defined at gazpromtelecom.ru.
Question and response
Question
dig mail.gazpromtelecom.ru. NS
Answer
The response has no answer records.
Authority
gazpromtelecom.ru. 3600 SOA ns.gazpromtelecom.ru. root.gazpromtelecom.ru. 2026011401 10800 3600 1209600 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0