18.166.0.0/15

ip:	18.166.0.0 ec2-18-166-0-0.ap-east-1.compute.amazonaws.com
loc:	Hong Kong, Hong Kong (Central and Western)  
isp:	AS16509 Amazon.com, Inc. » Amazon Technologies Inc. » AWS EC2 (ap-east-1) 419.096 ms
route:	18.166.0.0/15, AMAZON-HKG - Amazon Data Services Hong Kong, CN (Hong Kong) ... 
reg:	18.128.0.0/9, US, ARIN, 2019-10-07
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  535 Jaffe Road Causeway Bay Hong Kong HK
online:	  15.927 » latency: 259 ms (248ms) 

see also:
   18.164.0.0/14    AS16509  AMAZON-CF Amazon.com, Inc., US