3.5.66.0/24

ip:	3.5.66.0 s3-eu-west-1-r-w.amazonaws.com
loc:	Ireland, Dublin (Leinster)  
isp:	AS16509 Amazon.com, Inc. » Amazon Technologies Inc. » AWS EC2 (eu-west-1) 275.373 ms
route:	3.5.66.0/24, AMAZON-S3 - Amazon Data Services Northern Virginia, US (Dublin) ... 
reg:	3.0.0.0/9, US, ARIN, 2017-12-20
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  13200 Woodland Park Road Herndon VA 20171 US
online:	  84 » latency: 46 ms (46ms) 

see also:
   3.0.0.0/10       AS16509  AT-88-Z Amazon Technologies Inc., US
   3.5.64.0/21      AS16509  AMAZON-S3 Amazon Data Services Northern Virginia, IE