esa3.hc324-48.eu.iphmx.com.
Question and response
Question
dig 121.68.54.207.in-addr.arpa.eu.iphmx.com. PTR
Answer
121.68.54.207.in-addr.arpa.eu.iphmx.com. 3600 PTR esa3.hc324-48.eu.iphmx.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0