mx-a.surfcert.nl.
Question and response
Question
dig 188.176-28.190.100.145.in-addr.arpa. PTR
Answer
188.176-28.190.100.145.in-addr.arpa. 3600 PTR mx-a.surfcert.nl.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0