esa.hc1530-96.ap.iphmx.com.
Question and response
Question
dig 155.29.138.139.in-addr.arpa.ap.iphmx.com. PTR
Answer
155.29.138.139.in-addr.arpa.ap.iphmx.com. 3600 PTR esa.hc1530-96.ap.iphmx.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0