mail-crm-rr05.avature.net.
Question and response
Question
dig 160.128-255.158.137.209.in-addr.arpa. PTR
Answer
160.128-255.158.137.209.in-addr.arpa. 5 PTR mail-crm-rr05.avature.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0