mail.gpt.ru has no NS records.
NS records for this zone are defined at gpt.ru.
NS records for this zone are defined at gpt.ru.
Question and response
Question
dig mail.gpt.ru. NS
Answer
The response has no answer records.
Authority
gpt.ru. 900 SOA ns1.r01.ru. noc.parkline.ru. 2025041408 10800 1800 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0