16.56.0.0/18

ip:	16.56.0.0 ec2-16-56-0-0.compute-1.amazonaws.com
loc:	United States, Ashburn (Virginia)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS EC2 (us-east-1) 0.27 ms
route:	16.56.0.0/18, AMAZO-4 - Amazon.com, Inc., US (Atlanta) ... 
reg:	16.56.0.0/15, US, ARIN, 2020-04-29
asn:	AS14618 - AMAZON-AES Amazon.com Inc., US
addr:	  Amazon Web Services Inc. P.O. Box 81226 Seattle WA 98108-1226 US
online:	  173 » latency: 123 ms (132ms) 

see also:
   16.56.0.0/16     AS16509  AMAZO-4 Amazon.com, Inc., US