esa11.hc1455-7.c3s2.iphmx.com.
Question and response
Question
dig 137.90.54.207.in-addr.arpa.c3s2.iphmx.com. PTR
Answer
137.90.54.207.in-addr.arpa.c3s2.iphmx.com. 3600 PTR esa11.hc1455-7.c3s2.iphmx.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0