vsp.itsystem.se.
Question and response
Question
dig 237.128-25.55.112.212.in-addr.arpa. PTR
Answer
237.128-25.55.112.212.in-addr.arpa. 3600 PTR vsp.itsystem.se.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0