3.171.147.0/24

ip:	3.171.147.0 server-3-171-147-0.iah50.r.cloudfront.net
loc:	United States, Houston (Texas)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS CloudFront (GLOBAL) 379.315 ms
route:	3.171.147.0/24, 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:	  253 » latency: 146 ms (146ms) 

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