Question and response
Question
dig mail.yandex.ru. NS
Answer
mail.yandex.ru. 172800 NS ns4.yandex.ru.
mail.yandex.ru. 172800 NS ns3.yandex.ru.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0