mx11.centerasecurity.dk.
Question and response
Question
dig 77.0-254.19.233.89.in-addr.arpa. PTR
Answer
77.0-254.19.233.89.in-addr.arpa. 5 PTR mx11.centerasecurity.dk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0