74.205.0.0/17

ip:	74.205.0.0 
loc:	United States, Washington (District of Columbia)  
isp:	AS27357 Rackspace Hosting » Rackspace Hosting » Rackspace Hosting 131.445 ms
route:	74.205.0.0/17, RACKS-8 - Rackspace Hosting, US (Washington D.C.) ... 
reg:	74.205.0.0/17, US, ARIN, 2006-11-20
addr:	  1718 Dry Creek Way Ste 115 San Antonio TX 78259-1837 US
online:	  2.241 » latency: 134 ms (108ms) 

see also:
   74.205.0.0/19    AS27357  RSCP-NET-4 Rackspace Hosting, US
   74.205.32.0/19   AS33070  RSCP-NET-4 Rackspace Hosting, US
   74.205.64.0/18   AS33070  RSCP-NET-4 Rackspace Hosting, US