3.171.72.0/22

ip:	3.171.72.0 server-3-171-72-0.iad89.r.cloudfront.net
loc:	United States, Washington (District of Columbia)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS CloudFront (GLOBAL) 280.926 ms
route:	3.171.72.0/22, AMAZON-CF - Amazon.com, Inc., US (Washington D.C.) ... 
reg:	3.128.0.0/9, US, ARIN, 2018-06-25
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  1918 8th Ave SEATTLE WA 98101-1244 US
online:	  1.010 » latency: 110 ms (110ms) 

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