180.132.250.130.in-addr.arpa.
Question and response
Question
dig pdxsmtp.mcshosts.net. PTR
Answer
pdxsmtp.mcshosts.net. 3600 PTR 180.132.250.130.in-addr.arpa.
Authority
mcshosts.net. 172800 NS ns-1069.awsdns-05.org.
mcshosts.net. 172800 NS ns-1753.awsdns-27.co.uk.
mcshosts.net. 172800 NS ns-281.awsdns-35.com.
mcshosts.net. 172800 NS ns-958.awsdns-55.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0