3.173.192.0

ip:	3.173.192.0 server-3-173-192-0.nrt12.r.cloudfront.net
loc:	Japan, Chiyoda City (Tokyo)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS CloudFront (GLOBAL) 146.924 ms
route:	3.173.192.0/22, AMAZON-CF - Amazon.com, Inc., US ... 
reg:	3.128.0.0/9, US, ARIN, 2018-06-25
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  
online:	  1.001 » latency: 259 ms (261ms) 

see also:
   3.128.0.0/10     AS16509  AT-88-Z Amazon Technologies Inc., US