16.64.0.0/16

ip:	16.64.0.0 ec2-16-64-0-0.us-gov-east-1.compute.amazonaws.com
loc:	United States, Ashburn (Virginia)  
isp:	AS8987 Amazon Technologies Inc. » Amazon Data Services Ireland Ltd » AWS EC2 (us-gov-east-1) 1.407 ms
route:	16.64.0.0/16, AMAZO-4 - Amazon.com, Inc., US (Columbus) ... 
reg:	16.64.0.0/16, US, ARIN, 2019-04-04
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  Amazon Web Services Inc. P.O. Box 81226 Seattle WA 98108-1226 US
online:	  572 » latency: 129 ms (133ms) 

see also:
   16.64.0.0/17     AS8987   AMAZO-4 Amazon.com, Inc., US