3.128.0.0/10

ip:	3.128.0.0 ec2-3-128-0-0.us-east-2.compute.amazonaws.com
loc:	United States, Dublin (Ohio)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS EC2 (us-east-2) 1.238 ms
route:	3.128.0.0/10, AT-88-Z - Amazon Technologies Inc., US (Dublin) ... 
reg:	3.128.0.0/9, US, ARIN, 2018-06-25
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  410 Terry Ave N. Seattle WA 98109 US
online:	  893.039 » latency: 133 ms (201ms) 

see also:
   3.128.0.0/15     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.130.0.0/16     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.131.0.0/16     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.132.0.0/14     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.136.0.0/13     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.144.0.0/13     AS16509  AT-88-Z Amazon Technologies Inc., US
   3.160.2.0/23     AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.4.0/22     AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.8.0/22     AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.12.0/23    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.14.0/24    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.15.0/24    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.18.0/23    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.20.0/22    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.24.0/22    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.28.0/23    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.30.0/24    AS16509  AMAZON-CF Amazon.com, Inc., US
   3.160.31.0/24    AS16509  AMAZON-CF Amazon.com, Inc., US