mx.caravan.ru has no NS records.
NS records for this zone are defined at caravan.ru.
NS records for this zone are defined at caravan.ru.
Question and response
Question
dig mx.caravan.ru. NS
Answer
The response has no answer records.
Authority
caravan.ru. 3600 SOA sns1.rsnx.ru. noc.caravan.ru. 2024101586 14400 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0