52.44.0.0/15

ip:	52.44.0.0 ec2-52-44-0-0.compute-1.amazonaws.com
loc:	United States, Ashburn (Virginia)  
isp:	AS14618 Amazon.com, Inc. » Amazon.com, Inc. » AWS EC2 (us-east-1) 139.345 ms
route:	52.44.0.0/15, AT-88-Z - Amazon Technologies Inc., US (Ashburn) ... 
reg:	52.0.0.0/10, US, ARIN, 1991-12-19
asn:	AS14618 - AMAZON-AES Amazon.com Inc., US
	  AS16509 - AMAZON-02 Amazon.com, Inc., US
addr:	  410 Terry Ave N. Seattle WA 98109 US
online:	  11.050 » latency: 111 ms (114ms) 

see also:
   52.32.0.0/11     AS16509  AT-88-Z Amazon Technologies Inc., US