15.177.66.0/23

ip:	15.177.66.0 
loc:	United States, Dublin (Ohio)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS Route 53 health checks (us-east-2) 366.733 ms
route:	15.177.66.0/23, AT-88-Z - Amazon Technologies Inc., US (Columbus) ... 
reg:	15.177.0.0/16, US, ARIN, 2018-09-27
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  410 Terry Ave N. Seattle WA 98109 US

see also:
   15.177.0.0/16    AS16509  AT-88-Z Amazon Technologies Inc., US