35.71.64.0/24

ip:	35.71.64.0 dynamodb.us-west-2.amazonaws.com
loc:	United States, Portland (Oregon)  
isp:	AS16509 Amazon.com, Inc. » Amazon Technologies Inc. » AWS DynamoDB (us-west-2) 307.238 ms
route:	35.71.64.0/24, AMAZON-BYOIP - Amazon Data Services Northern Virginia, US (Portland) ... 
reg:	35.71.64.0/18, US, ARIN, 2019-04-15
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  410 Terry Ave N. Seattle WA 98109 US
online:	  46 » latency: 166 ms (166ms) 

see also:
   35.71.64.0/18    AS16509  AMAZON-BYOIP Amazon Data Services Northern Virginia, US
   35.71.64.0/22    AS16509  AMAZON-BYOIP Amazon Data Services Northern Virginia, US