Question and response
Question
dig mail.gblnet.ru. NS
Answer
mail.gblnet.ru. 5 CNAME mx.gblnet.ru.
Authority
gblnet.ru. 4299 SOA ns.gblnet.ru. vvv.gblnet.ru. 2026030201 10800 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0