dns.webcas.net.
Question and response
Question
dig 251.128-25.25.30.115.in-addr.arpa. PTR
Answer
251.128-25.25.30.115.in-addr.arpa. 3600 PTR dns.webcas.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0