Question and response
Question
dig csail.mit.edu. PTR
Answer
The response has no answer records.
Authority
csail.mit.edu. 900 SOA auth-ns0.csail.mit.edu. bug-domain.csail.mit.edu. 253592755 1800 300 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0