Question and response
Question
dig zix.com. NS
Answer
zix.com. 600 NS ns03.zixcorp.com.
zix.com. 600 NS ns01.zixcorp.com.
zix.com. 600 NS ns02.zixcorp.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0