puppet.theory7.net.
Question and response
Question
dig 138.128-25.231.154.213.in-addr.arpa. PTR
Answer
138.128-25.231.154.213.in-addr.arpa. 5 PTR puppet.theory7.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0