Address:   10.0.37.59            00001010.00000000.00100101.0011 1011
Netmask:   255.255.255.240 = 28  11111111.11111111.11111111.1111 0000
Wildcard:  0.0.0.15              00000000.00000000.00000000.0000 1111
=>
Network:   10.0.37.48/28         00001010.00000000.00100101.0011 0000 (Class A)
Broadcast: 10.0.37.63            00001010.00000000.00100101.0011 1111
HostMin:   10.0.37.49            00001010.00000000.00100101.0011 0001
HostMax:   10.0.37.62            00001010.00000000.00100101.0011 1110
Hosts/Net: 14                    (Private Internet)

Version 0.35.2 2005/07/07

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Download
07/27/2006 Security information
Screenshot (ipcalc works also at the prompt)
CGI wrapper that produced this page.
Archive
Have a look in the archives for the new version 0.41, with the capability to deaggregate network ranges
How to run this under windows
Debian users can apt-get install ipcalc
2000-2011 Krischan Jodies

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