IP Calculator
Address (Host or Network) Netmask (i.e. 24) Netmask for sub/supernet (optional)
/ move to:

 No host given
 No netmask given (using default netmask of your network's class)
 Illegal value for netmask ('')

Thanks to http://www.netzwerkinfo.de/daemons/ for this ip calculator icon :-)
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