smtp01.jetshop.io.
Question and response
Question
dig 56.48.54.247.212.in-addr.arpa. PTR
Answer
56.48.54.247.212.in-addr.arpa. 5 PTR smtp01.jetshop.io.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0