91.186.188.50.
Question and response
Question
dig hem-mail-02.ciphr247.com. PTR
Answer
hem-mail-02.ciphr247.com. 300 PTR 91.186.188.50.
Authority
ciphr247.com. 172800 NS ns-1298.awsdns-34.org.
ciphr247.com. 172800 NS ns-1937.awsdns-50.co.uk.
ciphr247.com. 172800 NS ns-69.awsdns-08.com.
ciphr247.com. 172800 NS ns-751.awsdns-29.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0