54.251.96.254.
Question and response
Question
dig mail.dropmysite.com. PTR
Answer
mail.dropmysite.com. 300 PTR 54.251.96.254.
Authority
dropmysite.com. 172800 NS ns-1092.awsdns-08.org.
dropmysite.com. 172800 NS ns-1802.awsdns-33.co.uk.
dropmysite.com. 172800 NS ns-253.awsdns-31.com.
dropmysite.com. 172800 NS ns-901.awsdns-48.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0