3.166.240.0/21

ip:	3.166.240.0 server-3-166-240-0.nrt20.r.cloudfront.net
loc:	Japan, Chiyoda City (Tokyo)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS CloudFront (GLOBAL) 305.338 ms
route:	3.166.240.0/21, AMAZON-CF - Amazon.com, Inc., US (Chiyoda) ... 
reg:	3.128.0.0/9, US, ARIN, 2018-06-25
asn:	AS16509 - AMAZON-02 Amazon.com, Inc., US
	  AS174   - COGENT-174 Cogent Communications, US
	  AS2497  - IIJ Internet Initiative Japan Inc., JP
	  AS2914  - NTT-DATA-2914 NTT America, Inc., US
	  AS6939  - HURRICANE Hurricane Electric LLC, US
	  AS6453  - AS6453 TATA COMMUNICATIONS (AMERICA) INC, US
addr:	  1918 8th Ave SEATTLE WA 98101-1244 US
online:	  1.932 » latency: 257 ms (257ms) 

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