esa.hc1097-55.ap.iphmx.com.
Question and response
Question
dig 42.45.138.139.in-addr.arpa.ap.iphmx.com. PTR
Answer
42.45.138.139.in-addr.arpa.ap.iphmx.com. 3600 PTR esa.hc1097-55.ap.iphmx.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0