mail-gw1.sfc.wide.ad.jp.
Question and response
Question
dig 151.128.142.178.203.in-addr.arpa. PTR
Answer
151.128.142.178.203.in-addr.arpa. 3600 PTR mail-gw1.sfc.wide.ad.jp.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0