216.136.161.142.
Question and response
Question
dig smtp02.bhnetwork.com. PTR
Answer
smtp02.bhnetwork.com. 300 PTR 216.136.161.142.
Authority
bhnetwork.com. 172800 NS ns-1179.awsdns-19.org.
bhnetwork.com. 172800 NS ns-1591.awsdns-06.co.uk.
bhnetwork.com. 172800 NS ns-318.awsdns-39.com.
bhnetwork.com. 172800 NS ns-904.awsdns-49.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0