Private IP Address Ranges for Networks

Private IP address blocks are the Internet Protocol addresses most often used for private networks. Most computer networks use addresses in one of the following ranges:

• 10.0.0.0 to 10.255.255.255

  
  



• 172.16.0.0 to 172.31.255.255

  
  



• 192.168.0.0 to 192.168.255.255

  
  

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Source:http://www.dummies.com/how-to/content/private-ip-address-ranges-for-networks.html