Question and response
Question
dig mx1.neustar.com. AAAA
Answer
The response has no answer records.
Authority
neustar.com. 86400 SOA udns1.ultradns.net. networkers.neustar.biz. 1311363932 86400 86400 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0