Question and response
Question
dig mx2.limestonenetworks.com. PTR
Answer
The response has no answer records.
Authority
limestonenetworks.com. 2560 SOA ns1.limestonenetworks.com. noc.limestonenetworks.com. 1771775900 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0