Question and response
Question
dig gcb.su. NS
Answer
gcb.su. 3600 NS ns-mail01.getcourse.ru.
gcb.su. 3600 NS ns-mail03.getcourse.ru.
gcb.su. 3600 NS ns-mail02.getcourse.ru.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0