67.160.135.40.in-addr.arpa.
Question and response
Question
dig az-courier.osgbilling.com. PTR
Answer
az-courier.osgbilling.com. 1800 PTR 67.160.135.40.in-addr.arpa.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0