mail-gu01-crm-rl01.avature.net.
Question and response
Question
dig 192.128-255.66.172.95.in-addr.arpa. PTR
Answer
192.128-255.66.172.95.in-addr.arpa. 360 PTR mail-gu01-crm-rl01.avature.net.
Authority
128-255.66.172.95.in-addr.arpa. 172800 NS ns-1502.awsdns-59.org.
128-255.66.172.95.in-addr.arpa. 172800 NS ns-1974.awsdns-54.co.uk.
128-255.66.172.95.in-addr.arpa. 172800 NS ns-415.awsdns-51.com.
128-255.66.172.95.in-addr.arpa. 172800 NS ns-610.awsdns-12.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0