3.5.252.0/24

ip:	3.5.252.0 s3-r-w.ca-central-1.amazonaws.com
loc:	Canada, Toronto (Ontario)  
isp:	AS16509 Amazon.com, Inc. » Amazon Technologies Inc. » AWS EC2 (ca-central-1) 276.855 ms
route:	3.5.252.0/24, AMAZON-S3 - Amazon Data Services Northern Virginia, US (Toronto) ... 
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:	  114 » latency: 113 ms (113ms) 

see also:
   3.0.0.0/10       AS16509  AT-88-Z Amazon Technologies Inc., US
   3.5.252.0/22     AS16509  AMAZON-S3 Amazon Data Services Northern Virginia, CA