mx.aironet.ru has no NS records.
NS records for this zone are defined at aironet.ru.
NS records for this zone are defined at aironet.ru.
Question and response
Question
dig mx.aironet.ru. NS
Answer
The response has no answer records.
Authority
aironet.ru. 7200 SOA ns.aironet.ru. wn.aironet.ru. 2023102643 7200 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0