Question and response
Question
dig usncsmtp.thruinc.com. A
Answer
usncsmtp.thruinc.com. 60 A 157.55.136.93
Authority
thruinc.com. 28800 NS a1.uberns.com.
thruinc.com. 28800 NS b1.uberns.com.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0