mx003.samtel.ru has no NS records.
NS records for this zone are defined at samtel.ru.
NS records for this zone are defined at samtel.ru.
Question and response
Question
dig mx003.samtel.ru. NS
Answer
The response has no answer records.
Authority
samtel.ru. 86400 SOA ns1.samtel.ru. root.samtel.ru. 2026021801 28800 3600 1814400 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0