23.216.4.0/24

ip:	23.216.4.0 a23-216-4-0.deploy.static.akamaitechnologies.com
loc:	Japan, Tokyo (Tokyo)  
isp:	AS20940 Akamai International B.V. » Akamai International B.V. » Akamai Technologies, Inc. 643.002 ms
route:	23.216.4.0/24, AKAMAI - Akamai Technologies, Inc., US (Tokyo) ... 
reg:	23.192.0.0/11, US, ARIN, 2013-07-12
asn:	AS20940 - AKAMAI-ASN1 Akamai International B.V., NL
addr:	  145 Broadway Cambridge MA 2142 US
online:	  169 » latency: 261 ms (261ms) 

see also:
   23.192.0.0/11    AS20940  AKAMAI Akamai Technologies, Inc., US