dstiles - 7:03 pm on Jun 5, 2013 (gmt 0)
New (to me) amazon IP range...
188.8.131.52 - 184.108.40.206
Found, oddly enough, by a report that amazon(.)in was now active. The Indian web site is apparently hosted in Ireland.
All MX records for the domain are in Amazon US ranges.
No indication of dates in DNS so no idea when the range was registered.