3.163.78.0/23

ip:	3.163.78.0 server-3-163-78-0.atl58.r.cloudfront.net
loc:	United States, Atlanta (Georgia)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS CloudFront (GLOBAL) 306.884 ms
route:	3.163.78.0/23, 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:	  502 » latency: 121 ms (121ms) 

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