198.210.16.0/21

ip:	198.210.16.0 
loc:	United States, Washington (District of Columbia)  
isp:	AS27357 Rackspace Hosting » Rackspace Hosting » KeepYourIP 145.259 ms
route:	198.210.16.0/21, MAIN-SERVER1-KEEPYOURIP - KeepYourIP, US (Grand Terrace) ... 
reg:	198.210.16.0/20, US, ARIN, 2012-03-28
asn:	AS3356 - LEVEL3 Level 3 Communications, US
	  AS12200 - RACKSPACE Rackspace Hosting, US
addr:	  22421 Barton Rd. #364 Grand Terrace CA 92313 US
online:	  1.018 » latency: 107 ms (95ms) 

see also:
   198.210.16.0/22  AS27357  MAIN-SERVER1-KEEPYOURIP KeepYourIP, US
   198.210.20.0/22  AS27357  MAIN-SERVER1-KEEPYOURIP KeepYourIP, US